src/vs/workbench/contrib/extensions/browser/extensionsList.ts/Renderer/renderPlaceholder
class Renderer:	renderPlaceholder(index: number, data: ITemplateData): void {
		data.element.classList.add('loading');

		data.root.removeAttribute('aria-label');
		data.root.removeAttribute('data-extension-id');
		data.extensionDisposables = dispose(data.extensionDisposables);
		data.icon.src = '';
		data.name.textContent = '';
		data.description.textContent = '';
		data.publisherDisplayName.textContent = '';
		data.verifiedPublisherIcon.style.display = 'none';
		data.installCount.style.display = 'none';
		data.ratings.style.display = 'none';
		data.extension = null;
	}