/**
 * Error indicating that something is not supported.
 */
export declare class UnsupportedError extends Error {
    constructor(message: string);
}
/**
 * Error produced when calling a method on a closed Worker.
 */
export declare class WorkerClosedError extends Error {
    constructor(message: string);
}
/**
 * Error indicating that a referenced entity doesn't exist.
 */
export declare class NotFoundError extends Error {
    constructor(message: string);
}
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