stream for a GFileInfo. When completed,
callback will be called with a GAsyncResult which can be used to
finish the operation with gFileOutputStreamQueryInfoFinish.gFileOutputStreamQueryInfoAsync(object, attributes, io.priority = 0, cancellable = NULL, callback, user.data = NULL)objectattributesio.prioritycancellableGCancellable object, NULL to ignore.callbackuser.datagFileOutputStreamQueryInfo.