#14410 contained a breaking API change to ButtonTheme:

    
      The constructors ButtonTheme() and ButtonTheme.bar() are no longer const constructible
      
ButtonTheme.textTheme is now ButtonTheme.data.textTheme

      
ButtonTheme.minWidth is now ButtonTheme.data.minWidth

      
ButtonTheme.height is now ButtonTheme.data.height

      
ButtonTheme.padding is now ButtonTheme.data.padding

#14410 changed the hierarchy of FlatButton and RaisedButton - they both inherit from RawMaterialButton now rather than from MaterialButton.

#14410 changed RaisedButton to no longer cast a shadow when disabled.

v0.0.23