Creates a material design drawer header.
Requires one of its ancestors to be a Material widget.
Source
const DrawerHeader({ Key key, this.decoration, this.padding: const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 8.0), this.duration: const Duration(milliseconds: 250), this.curve: Curves.fastOutSlowIn, this.child }) : super(key: key);