pub unsafe extern "C" fn gtk_builder_cscope_lookup_callback_symbol(
self_: *mut GtkBuilderCScope,
callback_name: *const c_char
) -> GCallback
pub unsafe extern "C" fn gtk_builder_cscope_lookup_callback_symbol(
self_: *mut GtkBuilderCScope,
callback_name: *const c_char
) -> GCallback