export interface ErrorListenerCallback {
    (error: any): void;
}
export interface ErrorListenerUnbind {
    (): void;
}
export declare class ErrorHandler {
    private unexpectedErrorHandler;
    private listeners;
    constructor();
    addListener(listener: ErrorListenerCallback): ErrorListenerUnbind;
    private emit;
    private _removeListener;
    setUnexpectedErrorHandler(newUnexpectedErrorHandler: (e: any) => void): void;
    getUnexpectedErrorHandler(): (e: any) => void;
    onUnexpectedError(e: any): void;
    onUnexpectedExternalError(e: any): void;
}
export declare const errorHandler: ErrorHandler;
/**
 * This function should only be called with errors that indicate a bug in the product.
 * E.g. buggy extensions/invalid user-input/network issues should not be able to trigger this code path.
 * If they are, this indicates there is also a bug in the product.
*/
export declare function onBugIndicatingError(e: any): undefined;
export declare function onUnexpectedError(e: any): undefined;
export declare function onUnexpectedExternalError(e: any): undefined;
export interface SerializedError {
    readonly $isError: true;
    readonly name: string;
    readonly message: string;
    readonly stack: string;
    readonly noTelemetry: boolean;
    readonly code?: string;
    readonly cause?: SerializedError;
}
export declare function transformErrorForSerialization(error: Error): SerializedError;
export declare function transformErrorForSerialization(error: any): any;
/**
 * Checks if the given error is a promise in canceled state
 */
export declare function isCancellationError(error: any): boolean;
export declare class CancellationError extends Error {
    constructor();
}
/**
 * @deprecated use {@link CancellationError `new CancellationError()`} instead
 */
export declare function canceled(): Error;
export declare function illegalArgument(name?: string): Error;
export declare function illegalState(name?: string): Error;
export declare class NotSupportedError extends Error {
    constructor(message?: string);
}
/**
 * Error that when thrown won't be logged in telemetry as an unhandled error.
 */
export declare class ErrorNoTelemetry extends Error {
    readonly name: string;
    constructor(msg?: string);
    static fromError(err: Error): ErrorNoTelemetry;
    static isErrorNoTelemetry(err: Error): err is ErrorNoTelemetry;
}
/**
 * This error indicates a bug.
 * Do not throw this for invalid user input.
 * Only catch this error to recover gracefully from bugs.
 */
export declare class BugIndicatingError extends Error {
    constructor(message?: string);
}