Function gio_sys::g_file_query_filesystem_info_async

pub unsafe extern fn g_file_query_filesystem_info_async(file: *mut GFile,
                                                        attributes: *const c_char,
                                                        io_priority: c_int,
                                                        cancellable: *mut GCancellable,
                                                        callback: GAsyncReadyCallback,
                                                        user_data: gpointer)