name : NotFoundError.ts import { createErrorClass } from './createErrorClass'; export interface NotFoundError extends Error {} export interface NotFoundErrorCtor { /** * @deprecated Internal implementation detail. Do not construct error instances. * Cannot be tagged as internal: https://github.com/ReactiveX/rxjs/issues/6269 */ new (message: string): NotFoundError; } /** * An error thrown when a value or values are missing from an * observable sequence. * * @see {@link operators/single} */ export const NotFoundError: NotFoundErrorCtor = createErrorClass( (_super) => function NotFoundErrorImpl(this: any, message: string) { _super(this); this.name = 'NotFoundError'; this.message = message; } );