Title constructor
Creates a widget that describes this app to the Android operating system.
title
will default to the empty string if not supplied.
color
must be an opaque color (i.e. color.alpha must be 255 (0xFF)).
color
and child
are required arguments.
Implementation
Title({
super.key,
this.title = '',
required this.color,
required this.child,
}) : assert(color.alpha == 0xFF);