UnderlineTabIndicator constructor

const UnderlineTabIndicator({BorderSide borderSide: const BorderSide(width: 2.0, color: Colors.white), EdgeInsetsGeometry insets: EdgeInsets.zero })

Create an underline style selected tab indicator.

The borderSide and insets arguments must not be null.

Implementation 

const UnderlineTabIndicator({
  this.borderSide = const BorderSide(width: 2.0, color: Colors.white),
  this.insets = EdgeInsets.zero,
}) : assert(borderSide != null), assert(insets != null);