silverInsets method
Add margin to Sliver type widget.
Implementation
Widget silverInsets(EdgeInsetsGeometry edgeInsets) {
final String className = toStringShort();
final isSliverWidget = className.startsWith('Sliver');
assert(isSliverWidget, 'Please use widgets of type Sliver...');
return SliverPadding(
padding: edgeInsets,
sliver: this,
);
}