buildWithChild method
A build method that receives an extra child parameter.
This method may be called with a child different from the parameter
passed to the constructor of SingleChildStatelessModifier.
It may also be called again with a different child, without this widget
being recreated.
Implementation
@override
Widget buildWithChild(BuildContext context, Widget? child) {
  return FloatingActionButton(
    key: modifierKey,
    backgroundColor: backgroundColor,
    clipBehavior: clipBehavior,
    disabledElevation: disabledElevation,
    elevation: elevation,
    enableFeedback: enableFeedback,
    focusColor: focusColor,
    focusElevation: focusElevation,
    focusNode: focusNode,
    foregroundColor: foregroundColor,
    heroTag: heroTag,
    highlightElevation: highlightElevation,
    hoverColor: hoverColor,
    hoverElevation: hoverElevation,
    isExtended: isExtended,
    materialTapTargetSize: materialTapTargetSize,
    mini: mini,
    mouseCursor: mouseCursor,
    shape: shape,
    splashColor: splashColor,
    tooltip: tooltip,
    onPressed: onPressed,
    autofocus: autofocus,
    child: child,
  );
}