src/vs/workbench/contrib/notebook/browser/view/cellParts/cellDnd.ts/CellDragAndDropController/dragCleanup
class CellDragAndDropController:	private dragCleanup(): void {
		if (this.currentDraggedCell) {
			this.draggedCells.forEach(cell => cell.dragging = false);
			this.currentDraggedCell = undefined;
			this.draggedCells = [];
		}

		this.setInsertIndicatorVisibility(false);
	}