src/vs/workbench/api/common/extHostWebviewPanels.ts/ExtHostWebviewPanel/title
class ExtHostWebviewPanel:	set title(value: string) {
		this.assertNotDisposed();
		if (this.#title !== value) {
			this.#title = value;
			this.#proxy.$setTitle(this.#handle, value);
		}
	}