child property
The widget below this widget in the tree.
This widget displays child when zero drags are under way. If childWhenDragging is non-null, this widget instead displays childWhenDragging when one or more drags are underway. Otherwise, this widget always displays child.
The feedback widget is shown under the pointer when a drag is under way.
To limit the number of simultaneous drags on multitouch devices, see maxSimultaneousDrags.
Implementation
final Widget? child;