miniCenterDocked constant Null safety
Centered FloatingActionButton, floating over the Scaffold.bottomNavigationBar so that the center of the floating action button lines up with the top of the bottom navigation bar; intended to be used with FloatingActionButton.mini set to true.
If the value of Scaffold.bottomNavigationBar is a BottomAppBar, the bottom app bar can include a "notch" in its shape that accommodates the overlapping floating action button.
This is unlikely to be a useful location for apps that lack a bottom navigation bar.
Implementation
static const FloatingActionButtonLocation miniCenterDocked = _MiniCenterDockedFabLocation();