Function gio_sys::g_file_replace_readwrite_async

pub unsafe extern fn g_file_replace_readwrite_async(file: *mut GFile,
                                                    etag: *const c_char,
                                                    make_backup: gboolean,
                                                    flags: GFileCreateFlags,
                                                    io_priority: c_int,
                                                    cancellable: *mut GCancellable,
                                                    callback: GAsyncReadyCallback,
                                                    user_data: gpointer)