You don’t get it. Yes, yours is 100%, I know that.
But the way you offer users to design the sidebar makes it 0% Material Design.
You need to offer 100% Material Design"able", not make it 100% Material Design…
So just offer users the option to choose as a property, if someone wants the default sidebar template Android offers, he will use that. If someone wants to design their own sidebar, he can design it like that.
I’m aware of this, and you did great. But can you offer an option to also let users choose this? To overlap the title bar or not?