Function gio_sys::g_file_mount_enclosing_volume

pub unsafe extern fn g_file_mount_enclosing_volume(location: *mut GFile,
                                                   flags: GMountMountFlags,
                                                   mount_operation: *mut GMountOperation,
                                                   cancellable: *mut GCancellable,
                                                   callback: GAsyncReadyCallback,
                                                   user_data: gpointer)