Dart APIunself_componentResponsiveLayoutBuildersmall small property Null safety ResponsiveLayoutWidgetBuilder small final ResponsiveLayoutWidgetBuilder for small layout. Implementation final ResponsiveLayoutWidgetBuilder small; unself_component unself_component ResponsiveLayoutBuilder small 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 ==