No centerTitle

[sallymariehollywood]

Hi - thankyou for a nice plugin which we are currently using.

Just one quick question - In standard AppBar, we have centerTitle property to centre the AppBar's title. What is the equivalent with this plugin ?

Furthermore, In a scaffold we can do this :

return Scaffold(
        body: ....
        appBar: _buildAppBar()); 

and buildAppBar returns a PreferredSize widget, i.e

return PreferredSize(
      child: rv,
      preferredSize: Size(double.infinity, kToolbarHeight),
    );

How can we make RoundedFloatingAppBar accept a PreferredSize widget ?