src/vs/workbench/contrib/webviewPanel/browser/webviewEditor.ts/WebviewEditor/createEditor
class WebviewEditor:	protected createEditor(parent: HTMLElement): void {
		const element = document.createElement('div');
		this._element = element;
		this._element.id = `webview-editor-element-${generateUuid()}`;
		parent.appendChild(element);

		this._scopedContextKeyService.value = this._contextKeyService.createScoped(element);
	}