src/vs/workbench/contrib/webviewPanel/browser/webviewEditor.ts/WebviewEditor/synchronizeWebviewContainerDimensions
class WebviewEditor:	private synchronizeWebviewContainerDimensions(webview: IOverlayWebview, dimension?: DOM.Dimension) {
		if (!this._element) {
			return;
		}
		const rootContainer = this._workbenchLayoutService.getContainer(Parts.EDITOR_PART);
		webview.layoutWebviewOverElement(this._element.parentElement!, dimension, rootContainer);
	}