// made with 
// http://jvilk.com/MakeTypes/

export interface IFlights {
    success: boolean;
    message: string;
    meta: Meta;
    data?: (IFlight)[] | null;
  }
  export interface Meta {
    totalCount: number;
  }
  export interface IFlight {
    IDFlight: string;
    FKGliderCategory: string;
    Category: string;
    FKCompetitionClass: string;
    FKCompetitionClassDesired?: null;
    CompetitionClass: string;
    FKLaunchtype: string;
    Launchtype: string;
    FKPilot: string;
    FirstName: string;
    LastName: string;
    Nationality: string;
    FKFederation?: string | null;
    ClubID?: string | null;
    ClubName?: string | null;
    Glider: string;
    FKGlider?: string | null;
    FKGliderBrand?: string | null;
    GliderBrand?: string | null;
    FKGliderClassification: string;
    GliderClassification: string;
    FKSeason: string;
    FlightDate: string;
    UtcOffset: string;
    FlightStartTime: string;
    FlightEndTime: string;
    FlightDuration: string;
    FirstLat: string;
    FirstLng: string;
    LastLat: string;
    LastLng: string;
    FlightMinLat: string;
    FlightMaxLat: string;
    FlightMinLng: string;
    FlightMaxLng: string;
    TakeoffCountry: string;
    FKTakeoffWaypoint: string;
    TakeoffWaypointOffset: string;
    TakeoffLocation?: string | null;
    TakeoffWaypointName: string;
    FKClosestWaypoint?: string | null;
    ClosestWaypointOffset?: string | null;
    LandingCountry: string;
    FKLandingWaypoint?: string | null;
    LandingWaypointOffset?: string | null;
    LandingWaypointName?: string | null;
    LandingLocation?: string | null;
    LinearDistance: string;
    MaxLinearDistance: string;
    ArcDistance?: string | null;
    FKBestTaskType: string;
    BestTaskType: string;
    BestTaskTypeKey: string;
    BestTaskDistance: string;
    BestTaskPoints: string;
    BestTaskDuration: string;
    MaxSpeed?: string | null;
    GroundSpeed?: string | null;
    BestTaskSpeed: string;
    TakeoffAltitude: string;
    MaxAltitude: string;
    MinAltitude: string;
    ElevationGain?: string | null;
    MeanAltitudeDiff: string;
    MaxClimb: string;
    MinClimb: string;
    Dataversion: string;
    ValidBRecordsCount?: string | null;
    AirspaceViolationLevel?: string | null;
    UserReviewComment: string;
    UserReviewStatus: string;
    ReviewRequired: string;
    ReviewReason: string;
    ReviewStatus: string;
    ReviewComment: string;
    ReviewBy: string;
    ReviewTime?: null;
    CommentsEnabled: string;
    CountComments: string;
    HasPhotos: string;
    IsBigSmileCandidate: string;
    WxcCivlID?: string | null;
    WxcNacStatus?: string | null;
    WxcSync?: string | null;
    WxcSyncTS?: string | null;
    IgcFilename: string;
    IgcFileHash: string;
    GRecordStatus: string;
    GValidationMessage: string;
    IsNew: string;
    CanRetract: string;
    StatisticsValid: string;
    UC?: string | null;
    TC: string;
    US: string;
    TS: string;
  }

  

  // Stores the currently-being-typechecked object for error messages.
let obj: any = null;
export class CFlightsProxy {
  public readonly success: boolean;
  public readonly message: string;
  public readonly meta: MetaProxy;
  public readonly data: CFlightProxy[] | null;
  public static Parse(d: string): CFlightsProxy {
    return CFlightsProxy.Create(JSON.parse(d));
  }
  public static Create(d: any, field: string = 'root'): CFlightsProxy {
    if (!field) {
      obj = d;
      field = "root";
    }
    if (d === null || d === undefined) {
      throwNull2NonNull(field, d);
    } else if (typeof(d) !== 'object') {
      throwNotObject(field, d, false);
    } else if (Array.isArray(d)) {
      throwIsArray(field, d, false);
    }
    checkBoolean(d.success, false, field + ".success");
    checkString(d.message, false, field + ".message");
    d.meta = MetaProxy.Create(d.meta, field + ".meta");
    checkArray(d.data, field + ".data");
    if (d.data) {
      for (let i = 0; i < d.data.length; i++) {
        d.data[i] = CFlightProxy.Create(d.data[i], field + ".data" + "[" + i + "]");
      }
    }
    if (d.data === undefined) {
      d.data = null;
    }
    return new CFlightsProxy(d);
  }
  private constructor(d: any) {
    this.success = d.success;
    this.message = d.message;
    this.meta = d.meta;
    this.data = d.data;
  }
}

export class MetaProxy {
  public readonly totalCount: number;
  public static Parse(d: string): MetaProxy {
    return MetaProxy.Create(JSON.parse(d));
  }
  public static Create(d: any, field: string = 'root'): MetaProxy {
    if (!field) {
      obj = d;
      field = "root";
    }
    if (d === null || d === undefined) {
      throwNull2NonNull(field, d);
    } else if (typeof(d) !== 'object') {
      throwNotObject(field, d, false);
    } else if (Array.isArray(d)) {
      throwIsArray(field, d, false);
    }
    checkNumber(d.totalCount, false, field + ".totalCount");
    return new MetaProxy(d);
  }
  private constructor(d: any) {
    this.totalCount = d.totalCount;
  }
}

export class CFlightProxy {
  public readonly IDFlight: string;
  public readonly FKGliderCategory: string;
  public readonly Category: string;
  public readonly FKCompetitionClass: string;
  public readonly FKCompetitionClassDesired: null;
  public readonly CompetitionClass: string;
  public readonly FKLaunchtype: string;
  public readonly Launchtype: string;
  public readonly FKPilot: string;
  public readonly FirstName: string;
  public readonly LastName: string;
  public readonly Nationality: string;
  public readonly FKFederation: string | null;
  public readonly ClubID: string | null;
  public readonly ClubName: string | null;
  public readonly Glider: string;
  public readonly FKGlider: string | null;
  public readonly FKGliderBrand: string | null;
  public readonly GliderBrand: string | null;
  public readonly FKGliderClassification: string;
  public readonly GliderClassification: string;
  public readonly FKSeason: string;
  public readonly FlightDate: string;
  public readonly UtcOffset: string;
  public readonly FlightStartTime: string;
  public readonly FlightEndTime: string;
  public readonly FlightDuration: string;
  public readonly FirstLat: string;
  public readonly FirstLng: string;
  public readonly LastLat: string;
  public readonly LastLng: string;
  public readonly FlightMinLat: string;
  public readonly FlightMaxLat: string;
  public readonly FlightMinLng: string;
  public readonly FlightMaxLng: string;
  public readonly TakeoffCountry: string;
  public readonly FKTakeoffWaypoint: string;
  public readonly TakeoffWaypointOffset: string;
  public readonly TakeoffLocation: string | null;
  public readonly TakeoffWaypointName: string;
  public readonly FKClosestWaypoint: string | null;
  public readonly ClosestWaypointOffset: string | null;
  public readonly LandingCountry: string;
  public readonly FKLandingWaypoint: string | null;
  public readonly LandingWaypointOffset: string | null;
  public readonly LandingWaypointName: string | null;
  public readonly LandingLocation: string | null;
  public readonly LinearDistance: string;
  public readonly MaxLinearDistance: string;
  public readonly ArcDistance: string | null;
  public readonly FKBestTaskType: string;
  public readonly BestTaskType: string;
  public readonly BestTaskTypeKey: string;
  public readonly BestTaskDistance: string;
  public readonly BestTaskPoints: string;
  public readonly BestTaskDuration: string;
  public readonly MaxSpeed: string | null;
  public readonly GroundSpeed: string | null;
  public readonly BestTaskSpeed: string;
  public readonly TakeoffAltitude: string;
  public readonly MaxAltitude: string;
  public readonly MinAltitude: string;
  public readonly ElevationGain: string | null;
  public readonly MeanAltitudeDiff: string;
  public readonly MaxClimb: string;
  public readonly MinClimb: string;
  public readonly Dataversion: string;
  public readonly ValidBRecordsCount: string | null;
  public readonly AirspaceViolationLevel: string | null;
  public readonly UserReviewComment: string;
  public readonly UserReviewStatus: string;
  public readonly ReviewRequired: string;
  public readonly ReviewReason: string;
  public readonly ReviewStatus: string;
  public readonly ReviewComment: string;
  public readonly ReviewBy: string;
  public readonly ReviewTime: null;
  public readonly CommentsEnabled: string;
  public readonly CountComments: string;
  public readonly HasPhotos: string;
  public readonly IsBigSmileCandidate: string;
  public readonly WxcCivlID: string | null;
  public readonly WxcNacStatus: string | null;
  public readonly WxcSync: string | null;
  public readonly WxcSyncTS: string | null;
  public readonly IgcFilename: string;
  public readonly IgcFileHash: string;
  public readonly GRecordStatus: string;
  public readonly GValidationMessage: string;
  public readonly IsNew: string;
  public readonly CanRetract: string;
  public readonly StatisticsValid: string;
  public readonly UC: string | null;
  public readonly TC: string;
  public readonly US: string;
  public readonly TS: string;
  public static Parse(d: string): CFlightProxy {
    return CFlightProxy.Create(JSON.parse(d));
  }
  public static Create(d: any, field: string = 'root'): IFlightProxy {
    if (!field) {
      obj = d;
      field = "root";
    }
    if (d === null || d === undefined) {
      throwNull2NonNull(field, d);
    } else if (typeof(d) !== 'object') {
      throwNotObject(field, d, false);
    } else if (Array.isArray(d)) {
      throwIsArray(field, d, false);
    }
    checkString(d.IDFlight, false, field + ".IDFlight");
    checkString(d.FKGliderCategory, false, field + ".FKGliderCategory");
    checkString(d.Category, false, field + ".Category");
    checkString(d.FKCompetitionClass, false, field + ".FKCompetitionClass");
    checkNull(d.FKCompetitionClassDesired, field + ".FKCompetitionClassDesired");
    if (d.FKCompetitionClassDesired === undefined) {
      d.FKCompetitionClassDesired = null;
    }
    checkString(d.CompetitionClass, false, field + ".CompetitionClass");
    checkString(d.FKLaunchtype, false, field + ".FKLaunchtype");
    checkString(d.Launchtype, false, field + ".Launchtype");
    checkString(d.FKPilot, false, field + ".FKPilot");
    checkString(d.FirstName, false, field + ".FirstName");
    checkString(d.LastName, false, field + ".LastName");
    checkString(d.Nationality, false, field + ".Nationality");
    checkString(d.FKFederation, true, field + ".FKFederation");
    if (d.FKFederation === undefined) {
      d.FKFederation = null;
    }
    checkString(d.ClubID, true, field + ".ClubID");
    if (d.ClubID === undefined) {
      d.ClubID = null;
    }
    checkString(d.ClubName, true, field + ".ClubName");
    if (d.ClubName === undefined) {
      d.ClubName = null;
    }
    checkString(d.Glider, false, field + ".Glider");
    checkString(d.FKGlider, true, field + ".FKGlider");
    if (d.FKGlider === undefined) {
      d.FKGlider = null;
    }
    checkString(d.FKGliderBrand, true, field + ".FKGliderBrand");
    if (d.FKGliderBrand === undefined) {
      d.FKGliderBrand = null;
    }
    checkString(d.GliderBrand, true, field + ".GliderBrand");
    if (d.GliderBrand === undefined) {
      d.GliderBrand = null;
    }
    checkString(d.FKGliderClassification, false, field + ".FKGliderClassification");
    checkString(d.GliderClassification, false, field + ".GliderClassification");
    checkString(d.FKSeason, false, field + ".FKSeason");
    checkString(d.FlightDate, false, field + ".FlightDate");
    checkString(d.UtcOffset, false, field + ".UtcOffset");
    checkString(d.FlightStartTime, false, field + ".FlightStartTime");
    checkString(d.FlightEndTime, false, field + ".FlightEndTime");
    checkString(d.FlightDuration, false, field + ".FlightDuration");
    checkString(d.FirstLat, false, field + ".FirstLat");
    checkString(d.FirstLng, false, field + ".FirstLng");
    checkString(d.LastLat, false, field + ".LastLat");
    checkString(d.LastLng, false, field + ".LastLng");
    checkString(d.FlightMinLat, false, field + ".FlightMinLat");
    checkString(d.FlightMaxLat, false, field + ".FlightMaxLat");
    checkString(d.FlightMinLng, false, field + ".FlightMinLng");
    checkString(d.FlightMaxLng, false, field + ".FlightMaxLng");
    checkString(d.TakeoffCountry, false, field + ".TakeoffCountry");
    checkString(d.FKTakeoffWaypoint, false, field + ".FKTakeoffWaypoint");
    checkString(d.TakeoffWaypointOffset, false, field + ".TakeoffWaypointOffset");
    checkString(d.TakeoffLocation, true, field + ".TakeoffLocation");
    if (d.TakeoffLocation === undefined) {
      d.TakeoffLocation = null;
    }
    checkString(d.TakeoffWaypointName, false, field + ".TakeoffWaypointName");
    checkString(d.FKClosestWaypoint, true, field + ".FKClosestWaypoint");
    if (d.FKClosestWaypoint === undefined) {
      d.FKClosestWaypoint = null;
    }
    checkString(d.ClosestWaypointOffset, true, field + ".ClosestWaypointOffset");
    if (d.ClosestWaypointOffset === undefined) {
      d.ClosestWaypointOffset = null;
    }
    checkString(d.LandingCountry, false, field + ".LandingCountry");
    checkString(d.FKLandingWaypoint, true, field + ".FKLandingWaypoint");
    if (d.FKLandingWaypoint === undefined) {
      d.FKLandingWaypoint = null;
    }
    checkString(d.LandingWaypointOffset, true, field + ".LandingWaypointOffset");
    if (d.LandingWaypointOffset === undefined) {
      d.LandingWaypointOffset = null;
    }
    checkString(d.LandingWaypointName, true, field + ".LandingWaypointName");
    if (d.LandingWaypointName === undefined) {
      d.LandingWaypointName = null;
    }
    checkString(d.LandingLocation, true, field + ".LandingLocation");
    if (d.LandingLocation === undefined) {
      d.LandingLocation = null;
    }
    checkString(d.LinearDistance, false, field + ".LinearDistance");
    checkString(d.MaxLinearDistance, false, field + ".MaxLinearDistance");
    checkString(d.ArcDistance, true, field + ".ArcDistance");
    if (d.ArcDistance === undefined) {
      d.ArcDistance = null;
    }
    checkString(d.FKBestTaskType, false, field + ".FKBestTaskType");
    checkString(d.BestTaskType, false, field + ".BestTaskType");
    checkString(d.BestTaskTypeKey, false, field + ".BestTaskTypeKey");
    checkString(d.BestTaskDistance, false, field + ".BestTaskDistance");
    checkString(d.BestTaskPoints, false, field + ".BestTaskPoints");
    checkString(d.BestTaskDuration, false, field + ".BestTaskDuration");
    checkString(d.MaxSpeed, true, field + ".MaxSpeed");
    if (d.MaxSpeed === undefined) {
      d.MaxSpeed = null;
    }
    checkString(d.GroundSpeed, true, field + ".GroundSpeed");
    if (d.GroundSpeed === undefined) {
      d.GroundSpeed = null;
    }
    checkString(d.BestTaskSpeed, false, field + ".BestTaskSpeed");
    checkString(d.TakeoffAltitude, false, field + ".TakeoffAltitude");
    checkString(d.MaxAltitude, false, field + ".MaxAltitude");
    checkString(d.MinAltitude, false, field + ".MinAltitude");
    checkString(d.ElevationGain, true, field + ".ElevationGain");
    if (d.ElevationGain === undefined) {
      d.ElevationGain = null;
    }
    checkString(d.MeanAltitudeDiff, false, field + ".MeanAltitudeDiff");
    checkString(d.MaxClimb, false, field + ".MaxClimb");
    checkString(d.MinClimb, false, field + ".MinClimb");
    checkString(d.Dataversion, false, field + ".Dataversion");
    checkString(d.ValidBRecordsCount, true, field + ".ValidBRecordsCount");
    if (d.ValidBRecordsCount === undefined) {
      d.ValidBRecordsCount = null;
    }
    checkString(d.AirspaceViolationLevel, true, field + ".AirspaceViolationLevel");
    if (d.AirspaceViolationLevel === undefined) {
      d.AirspaceViolationLevel = null;
    }
    checkString(d.UserReviewComment, false, field + ".UserReviewComment");
    checkString(d.UserReviewStatus, false, field + ".UserReviewStatus");
    checkString(d.ReviewRequired, false, field + ".ReviewRequired");
    checkString(d.ReviewReason, false, field + ".ReviewReason");
    checkString(d.ReviewStatus, false, field + ".ReviewStatus");
    checkString(d.ReviewComment, false, field + ".ReviewComment");
    checkString(d.ReviewBy, false, field + ".ReviewBy");
    checkNull(d.ReviewTime, field + ".ReviewTime");
    if (d.ReviewTime === undefined) {
      d.ReviewTime = null;
    }
    checkString(d.CommentsEnabled, false, field + ".CommentsEnabled");
    checkString(d.CountComments, false, field + ".CountComments");
    checkString(d.HasPhotos, false, field + ".HasPhotos");
    checkString(d.IsBigSmileCandidate, false, field + ".IsBigSmileCandidate");
    checkString(d.WxcCivlID, true, field + ".WxcCivlID");
    if (d.WxcCivlID === undefined) {
      d.WxcCivlID = null;
    }
    checkString(d.WxcNacStatus, true, field + ".WxcNacStatus");
    if (d.WxcNacStatus === undefined) {
      d.WxcNacStatus = null;
    }
    checkString(d.WxcSync, true, field + ".WxcSync");
    if (d.WxcSync === undefined) {
      d.WxcSync = null;
    }
    checkString(d.WxcSyncTS, true, field + ".WxcSyncTS");
    if (d.WxcSyncTS === undefined) {
      d.WxcSyncTS = null;
    }
    checkString(d.IgcFilename, false, field + ".IgcFilename");
    checkString(d.IgcFileHash, false, field + ".IgcFileHash");
    checkString(d.GRecordStatus, false, field + ".GRecordStatus");
    checkString(d.GValidationMessage, false, field + ".GValidationMessage");
    checkString(d.IsNew, false, field + ".IsNew");
    checkString(d.CanRetract, false, field + ".CanRetract");
    checkString(d.StatisticsValid, false, field + ".StatisticsValid");
    checkString(d.UC, true, field + ".UC");
    if (d.UC === undefined) {
      d.UC = null;
    }
    checkString(d.TC, false, field + ".TC");
    checkString(d.US, false, field + ".US");
    checkString(d.TS, false, field + ".TS");
    return new CFlightProxy(d);
  }
  private constructor(d: any) {
    this.IDFlight = d.IDFlight;
    this.FKGliderCategory = d.FKGliderCategory;
    this.Category = d.Category;
    this.FKCompetitionClass = d.FKCompetitionClass;
    this.FKCompetitionClassDesired = d.FKCompetitionClassDesired;
    this.CompetitionClass = d.CompetitionClass;
    this.FKLaunchtype = d.FKLaunchtype;
    this.Launchtype = d.Launchtype;
    this.FKPilot = d.FKPilot;
    this.FirstName = d.FirstName;
    this.LastName = d.LastName;
    this.Nationality = d.Nationality;
    this.FKFederation = d.FKFederation;
    this.ClubID = d.ClubID;
    this.ClubName = d.ClubName;
    this.Glider = d.Glider;
    this.FKGlider = d.FKGlider;
    this.FKGliderBrand = d.FKGliderBrand;
    this.GliderBrand = d.GliderBrand;
    this.FKGliderClassification = d.FKGliderClassification;
    this.GliderClassification = d.GliderClassification;
    this.FKSeason = d.FKSeason;
    this.FlightDate = d.FlightDate;
    this.UtcOffset = d.UtcOffset;
    this.FlightStartTime = d.FlightStartTime;
    this.FlightEndTime = d.FlightEndTime;
    this.FlightDuration = d.FlightDuration;
    this.FirstLat = d.FirstLat;
    this.FirstLng = d.FirstLng;
    this.LastLat = d.LastLat;
    this.LastLng = d.LastLng;
    this.FlightMinLat = d.FlightMinLat;
    this.FlightMaxLat = d.FlightMaxLat;
    this.FlightMinLng = d.FlightMinLng;
    this.FlightMaxLng = d.FlightMaxLng;
    this.TakeoffCountry = d.TakeoffCountry;
    this.FKTakeoffWaypoint = d.FKTakeoffWaypoint;
    this.TakeoffWaypointOffset = d.TakeoffWaypointOffset;
    this.TakeoffLocation = d.TakeoffLocation;
    this.TakeoffWaypointName = d.TakeoffWaypointName;
    this.FKClosestWaypoint = d.FKClosestWaypoint;
    this.ClosestWaypointOffset = d.ClosestWaypointOffset;
    this.LandingCountry = d.LandingCountry;
    this.FKLandingWaypoint = d.FKLandingWaypoint;
    this.LandingWaypointOffset = d.LandingWaypointOffset;
    this.LandingWaypointName = d.LandingWaypointName;
    this.LandingLocation = d.LandingLocation;
    this.LinearDistance = d.LinearDistance;
    this.MaxLinearDistance = d.MaxLinearDistance;
    this.ArcDistance = d.ArcDistance;
    this.FKBestTaskType = d.FKBestTaskType;
    this.BestTaskType = d.BestTaskType;
    this.BestTaskTypeKey = d.BestTaskTypeKey;
    this.BestTaskDistance = d.BestTaskDistance;
    this.BestTaskPoints = d.BestTaskPoints;
    this.BestTaskDuration = d.BestTaskDuration;
    this.MaxSpeed = d.MaxSpeed;
    this.GroundSpeed = d.GroundSpeed;
    this.BestTaskSpeed = d.BestTaskSpeed;
    this.TakeoffAltitude = d.TakeoffAltitude;
    this.MaxAltitude = d.MaxAltitude;
    this.MinAltitude = d.MinAltitude;
    this.ElevationGain = d.ElevationGain;
    this.MeanAltitudeDiff = d.MeanAltitudeDiff;
    this.MaxClimb = d.MaxClimb;
    this.MinClimb = d.MinClimb;
    this.Dataversion = d.Dataversion;
    this.ValidBRecordsCount = d.ValidBRecordsCount;
    this.AirspaceViolationLevel = d.AirspaceViolationLevel;
    this.UserReviewComment = d.UserReviewComment;
    this.UserReviewStatus = d.UserReviewStatus;
    this.ReviewRequired = d.ReviewRequired;
    this.ReviewReason = d.ReviewReason;
    this.ReviewStatus = d.ReviewStatus;
    this.ReviewComment = d.ReviewComment;
    this.ReviewBy = d.ReviewBy;
    this.ReviewTime = d.ReviewTime;
    this.CommentsEnabled = d.CommentsEnabled;
    this.CountComments = d.CountComments;
    this.HasPhotos = d.HasPhotos;
    this.IsBigSmileCandidate = d.IsBigSmileCandidate;
    this.WxcCivlID = d.WxcCivlID;
    this.WxcNacStatus = d.WxcNacStatus;
    this.WxcSync = d.WxcSync;
    this.WxcSyncTS = d.WxcSyncTS;
    this.IgcFilename = d.IgcFilename;
    this.IgcFileHash = d.IgcFileHash;
    this.GRecordStatus = d.GRecordStatus;
    this.GValidationMessage = d.GValidationMessage;
    this.IsNew = d.IsNew;
    this.CanRetract = d.CanRetract;
    this.StatisticsValid = d.StatisticsValid;
    this.UC = d.UC;
    this.TC = d.TC;
    this.US = d.US;
    this.TS = d.TS;
  }
}

function throwNull2NonNull(field: string, d: any): never {
  return errorHelper(field, d, "non-nullable object", false);
}
function throwNotObject(field: string, d: any, nullable: boolean): never {
  return errorHelper(field, d, "object", nullable);
}
function throwIsArray(field: string, d: any, nullable: boolean): never {
  return errorHelper(field, d, "object", nullable);
}
function checkArray(d: any, field: string): void {
  if (!Array.isArray(d) && d !== null && d !== undefined) {
    errorHelper(field, d, "array", true);
  }
}
function checkNumber(d: any, nullable: boolean, field: string): void {
  if (typeof(d) !== 'number' && (!nullable || (nullable && d !== null && d !== undefined))) {
    errorHelper(field, d, "number", nullable);
  }
}
function checkBoolean(d: any, nullable: boolean, field: string): void {
  if (typeof(d) !== 'boolean' && (!nullable || (nullable && d !== null && d !== undefined))) {
    errorHelper(field, d, "boolean", nullable);
  }
}
function checkString(d: any, nullable: boolean, field: string): void {
  if (typeof(d) !== 'string' && (!nullable || (nullable && d !== null && d !== undefined))) {
    errorHelper(field, d, "string", nullable);
  }
}
function checkNull(d: any, field: string): void {
  if (d !== null && d !== undefined) {
    errorHelper(field, d, "null or undefined", false);
  }
}
function errorHelper(field: string, d: any, type: string, nullable: boolean): never {
  if (nullable) {
    type += ", null, or undefined";
  }
  throw new TypeError('Expected ' + type + " at " + field + " but found:\n" + JSON.stringify(d) + "\n\nFull object:\n" + JSON.stringify(obj));
}