Dart APIunself_componentResponsiveLayoutBuilderlarge large property Null safety ResponsiveLayoutWidgetBuilder large final ResponsiveLayoutWidgetBuilder for large layout. Implementation final ResponsiveLayoutWidgetBuilder large; unself_component unself_component ResponsiveLayoutBuilder large property ResponsiveLayoutBuilder class Constructors ResponsiveLayoutBuilder Properties child hashCode key large medium runtimeType small xLarge Methods build createElement debugDescribeChildren debugFillProperties noSuchMethod toDiagnosticsNode toString toStringDeep toStringShallow toStringShort Operators operator ==