ThemeDataTween constructor

ThemeDataTween({ThemeData begin, ThemeData end })

Creates a ThemeData tween.

The begin and end properties must be non-null before the tween is first used, but the arguments can be null if the values are going to be filled in later.

Implementation 

ThemeDataTween({ ThemeData begin, ThemeData end }) : super(begin: begin, end: end);