I also not sure why I have it inside my code. It appears to me that I will set Drawer.GestureEnabled = False when I want to show a panel on top of a CustomListview and prevent scrolling the screen.
if ExtraWidth is just a variable (without a Getter or a Setter), there is no way of documenting it in the library (as far as I'm aware). I have many variables like this myself in my libraries and I really don't want to write a Getter/Setter for each of them. Maybe Erel can come up for a solution to comment these...