Function gio_sys::g_file_replace_async

pub unsafe extern fn g_file_replace_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)