child property Null safety
final
The widget below this widget in the tree.
The overscroll indicator will paint on top of this child. This child (and its subtree) should include a source of ScrollNotification notifications.
Typically a GlowingOverscrollIndicator is created by a ScrollBehavior.buildOverscrollIndicator method, in which case the child is usually the one provided as an argument to that method.
Implementation
final Widget? child;