src/vs/workbench/contrib/files/browser/views/explorerViewer.ts/FileDragAndDrop/getStatsFromDragAndDropData
class FileDragAndDrop:	private static getStatsFromDragAndDropData(data: ElementsDragAndDropData<ExplorerItem, ExplorerItem[]>, dragStartEvent?: DragEvent): ExplorerItem[] {
		if (data.context) {
			return data.context;
		}

		// Detect compressed folder dragging
		if (dragStartEvent && data.elements.length === 1) {
			data.context = [FileDragAndDrop.getCompressedStatFromDragEvent(data.elements[0], dragStartEvent)];
			return data.context;
		}

		return data.elements;
	}