@headless-tree/coreFunctionsisOrderedDragTargetisOrderedDragTarget CallableisOrderedDragTarget<T>(dragTarget: DragTarget<T>): dragTarget is { childIndex: number; dragLineIndex: number; dragLineLevel: number; insertionIndex: number; item: ItemInstance<T> }Type parametersTParametersdragTarget: DragTarget<T>Returns dragTarget is { childIndex: number; dragLineIndex: number; dragLineLevel: number; insertionIndex: number; item: ItemInstance<T> }