* @count: the number of bytes you want to read
* @cancellable: (allow-none): a #GCancellable, or %NULL
* @error: #GError for error reporting, or %NULL to ignore.
* @count: the number of bytes you want to read
* @cancellable: (allow-none): a #GCancellable, or %NULL
* @error: #GError for error reporting, or %NULL to ignore.