also in `dev11` it’s impossible to extend `Brush` ...

# compose

[camkadev]

also in dev11 it’s impossible to extend Brush class with message '<init>': it is private in 'Brush'

[Kazemihabib1996]

It's been removed and replace with DrawModifier

[camkadev]

i really don’t see reason to make Brush sealed, now i can’t create custom Brush