import WebSocketClient, { EventListener } from './websocket-client';
import WebSocketMetrics from './websocket-metrics';
export default class PlainWebSocketClient extends WebSocketClient {
    private readonly _ws;
    private _metrics;
    constructor(url: string, listener: EventListener);
    get isConnecting(): boolean;
    get isConnected(): boolean;
    get metrics(): WebSocketMetrics;
    close(): void;
    send(data: ArrayBufferLike | Blob | ArrayBufferView): Promise<void>;
}
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