src/vs/workbench/contrib/notebook/browser/view/cellParts/cellDnd.ts/CellDragAndDropController/getExplicitDragDropDirection
class CellDragAndDropController:	private getExplicitDragDropDirection(clientY: number, cellTop: number, cellHeight: number) {
		const dragPosInElement = clientY - cellTop;
		const dragPosRatio = dragPosInElement / cellHeight;

		return this.getDropInsertDirection(dragPosRatio);
	}