src/vs/editor/contrib/dnd/browser/dnd.ts/DragAndDropController/showAt
class DragAndDropController:	public showAt(position: Position): void {
		this._dndDecorationIds.set([{
			range: new Range(position.lineNumber, position.column, position.lineNumber, position.column),
			options: DragAndDropController._DECORATION_OPTIONS
		}]);
		this._editor.revealPosition(position, ScrollType.Immediate);
	}