src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts/MarkupCell/toggleDragDropEnabled
class MarkupCell:		public toggleDragDropEnabled(enabled: boolean) {
			if (enabled) {
				this.element.classList.add('draggable');
				this.element.setAttribute('draggable', 'true');
			} else {
				this.element.classList.remove('draggable');
				this.element.removeAttribute('draggable');
			}
		}