src/vs/workbench/contrib/webview/browser/webviewElement.ts/WebviewElement/mountTo
class WebviewElement:	public mountTo(_stopBlockingIframeDragEvents: HTMLElement) {
		if (!this.element) {
			return;
		}

		if (this._webviewFindWidget) {
			_stopBlockingIframeDragEvents.appendChild(this._webviewFindWidget.getDomNode());
		}

		for (const eventName of [EventType.MOUSE_DOWN, EventType.MOUSE_MOVE, EventType.DROP]) {
			this._register(addDisposableListener(_stopBlockingIframeDragEvents, eventName, () => {
				this._stopBlockingIframeDragEvents();
			}));
		}

		for (const node of [_stopBlockingIframeDragEvents, window]) {
			this._register(addDisposableListener(node, EventType.DRAG_END, () => {
				this._stopBlockingIframeDragEvents();
			}));
		}

		_stopBlockingIframeDragEvents.appendChild(this.element);
	}