Disable mutable parameters in trampoline functions
Disable mutable parameters in trampoline functions

gtk-rs/gir,gkoz/gir,GuillaumeGomez/gir,EPashkin/gir,gtk-rs/gir,GuillaumeGomez/gir,gkoz/gir,gtk-rs/gir,EPashkin/gir,GuillaumeGomez/gir