Method close

deps/undici/undici.js:16913–16919

* Closes the connection, if any, and sets the readyState attribute to * CLOSED.

()

       * CLOSED.
       */
      close() {
        webidl.brandCheck(this, _EventSource);
        if (this.#readyState === CLOSED) return;
        this.#readyState = CLOSED;
        this.#controller.abort();
        this.#request = null;
      }
      get onopen() {
        return this.#events.open;
      }