export declare class WebSocketClosedError extends Error {
    name: string;
    code: number;
    reason: string;
    constructor(message: string, event?: CloseEvent);
}
export declare class AbortedError extends Error {
    name: string;
}
export declare class UnexpectedMessageError extends Error {
    name: string;
    unexpectedMessage: any;
    constructor(unexpectedMessage: any);
}
export declare const noError: unique symbol;
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