src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/_backgroundMarkdownRendering
class NotebookEditorWidget:	private _backgroundMarkdownRendering() {
		if (this._backgroundMarkdownRenderRunning) {
			return;
		}

		this._backgroundMarkdownRenderRunning = true;
		runWhenIdle((deadline) => {
			this._backgroundMarkdownRenderingWithDeadline(deadline);
		});
	}