RaisedButton constructor

const RaisedButton({Key key, @required VoidCallback onPressed, ValueChanged<bool> onHighlightChanged, ButtonTextTheme textTheme, Color textColor, Color disabledTextColor, Color color, Color disabledColor, Color highlightColor, Color splashColor, Brightness colorBrightness, double elevation, double highlightElevation, double disabledElevation, EdgeInsetsGeometry padding, ShapeBorder shape, Clip clipBehavior: Clip.none, MaterialTapTargetSize materialTapTargetSize, Duration animationDuration, Widget child })

Create a filled button.

The elevation, highlightElevation, disabledElevation, and clipBehavior arguments must not be null.

Implementation 

const RaisedButton({
  Key key,
  @required VoidCallback onPressed,
  ValueChanged<bool> onHighlightChanged,
  ButtonTextTheme textTheme,
  Color textColor,
  Color disabledTextColor,
  Color color,
  Color disabledColor,
  Color highlightColor,
  Color splashColor,
  Brightness colorBrightness,
  double elevation,
  double highlightElevation,
  double disabledElevation,
  EdgeInsetsGeometry padding,
  ShapeBorder shape,
  Clip clipBehavior = Clip.none,
  MaterialTapTargetSize materialTapTargetSize,
  Duration animationDuration,
  Widget child,
}) : assert(elevation == null || elevation >= 0.0),
     assert(highlightElevation == null || highlightElevation >= 0.0),
     assert(disabledElevation == null || disabledElevation >= 0.0),
     super(
       key: key,
       onPressed: onPressed,
       onHighlightChanged: onHighlightChanged,
       textTheme: textTheme,
       textColor: textColor,
       disabledTextColor: disabledTextColor,
       color: color,
       disabledColor: disabledColor,
       highlightColor: highlightColor,
       splashColor: splashColor,
       colorBrightness: colorBrightness,
       elevation: elevation,
       highlightElevation: highlightElevation,
       disabledElevation: disabledElevation,
       padding: padding,
       shape: shape,
       clipBehavior: clipBehavior,
       materialTapTargetSize: materialTapTargetSize,
       animationDuration: animationDuration,
       child: child,
     );