DragEndCallback typedef

void DragEndCallback (DraggableDetails details)

Signature for when the draggable is dropped.

The velocity and offset at which the pointer was moving when the draggable was dropped is available in the DraggableDetails. Also included in the details is whether the draggable's DragTarget accepted it.

Used by Draggable.onDragEnd

Implementation 

typedef DragEndCallback = void Function(DraggableDetails details);