Method cancel

vscode/src/webview/createVscodeOrpcLink.ts:189–201

(reason: string)

  }

  cancel(reason: string): void {
    if (this.done) {
      return;
    }

    try {
      this.bridge.postMessage({ type: "orpcStreamCancel", streamId: this.streamId });
    } catch {
      // Best-effort: the webview might be disposed.
    }

    this.fail(new Error(`Stream cancelled: ${reason}`));
  }

  async next(): Promise<IteratorResult<T>> {
    if (this.error) {