pub type GDBusInterfaceMethodCallFunc = Option<unsafe extern "C" fn(connection: *mut GDBusConnection, sender: *const gchar, object_path: *const gchar, interface_name: *const gchar, method_name: *const gchar, parameters: *mut GVariant, invocation: *mut GDBusMethodInvocation, user_data: gpointer)>;
enum GDBusInterfaceMethodCallFunc {
None,
Some(unsafe extern "C" fn(_: *mut _GDBusConnection, _: *const i8, _: *const i8, _: *const i8, _: *const i8, _: *mut _GVariant, _: *mut _GDBusMethodInvocation, _: *mut c_void)),
}