sideIcon function Null safety

SideBuilder sideIcon(
  1. IconData icon
)

Customize the side icon

Implementation

SideBuilder sideIcon(IconData icon) {
  return (context, constraints) {
    return Padding(
      padding: const EdgeInsets.all(20),
      child: Icon(
        icon,
        color: Colors.blue,
        size: constraints.maxWidth / 3,
      ),
    );
  };
}