const ButtonTheme({Key key, ButtonTextTheme textTheme: ButtonTextTheme.normal, double minWidth: 88.0, double height: 36.0, EdgeInsets padding: const EdgeInsets.symmetric(horizontal: 16.0), Widget child })

Creates a button theme.

The child argument is required.

Source 

const ButtonTheme({
  Key key,
  this.textTheme: ButtonTextTheme.normal,
  this.minWidth: 88.0,
  this.height: 36.0,
  this.padding: const EdgeInsets.symmetric(horizontal: 16.0),
  Widget child
}) : super(key: key, child: child);