src/vs/workbench/contrib/notebook/browser/view/cellParts/cellOutput.ts/CellOutputElement/_renderSearchForMimetype
class CellOutputElement:	private _renderSearchForMimetype(viewModel: ICellOutputViewModel, mimeType: string): IInsetRenderOutput {
		const query = `@tag:notebookRenderer ${mimeType}`;
		return {
			type: RenderOutputType.Html,
			source: viewModel,
			htmlContent: `<p>No renderer could be found for mimetype "${mimeType}", but one might be available on the Marketplace.</p>
			<a href="command:workbench.extensions.search?%22${query}%22" class="monaco-button monaco-text-button" tabindex="0" role="button" style="padding: 8px; text-decoration: none; color: rgb(255, 255, 255); background-color: rgb(14, 99, 156); max-width: 200px;">Search Marketplace</a>`
		};
	}