Method ping

deps/undici/undici.js:16233–16246

* @param {WebSocket} ws * @param {Buffer|undefined} buffer

(ws, buffer)

       * @param {Buffer|undefined} buffer
       */
      static ping(ws, buffer) {
        if (Buffer.isBuffer(buffer)) {
          if (buffer.length > 125) {
            throw new TypeError("A PING frame cannot have a body larger than 125 bytes.");
          }
        } else if (buffer !== void 0) {
          throw new TypeError("Expected buffer payload");
        }
        const readyState = ws.#handler.readyState;
        if (isEstablished(readyState) && !isClosing(readyState) && !isClosed(readyState)) {
          const frame = new WebsocketFrameSend(buffer);
          ws.#handler.socket.write(frame.createFrame(opcodes.PING));
        }
      }
    };
    var { ping } = WebSocket;
    Reflect.deleteProperty(WebSocket, "ping");