/**
* gst_rtsp_client_session_filter:
* @client: a #GstRTSPClient
- * @func: (scope call): a callback
+ * @func: (scope call) (allow-none): a callback
* @user_data: user data passed to @func
*
* Call @func for each session managed by @client. The result value of @func
/**
* gst_rtsp_server_client_filter:
* @server: a #GstRTSPServer
- * @func: (scope call): a callback
+ * @func: (scope call) (allow-none): a callback
* @user_data: user data passed to @func
*
* Call @func for each client managed by @server. The result value of @func
/**
* gst_rtsp_session_pool_filter:
* @pool: a #GstRTSPSessionPool
- * @func: (scope call): a callback
+ * @func: (scope call) (allow-none): a callback
* @user_data: user data passed to @func
*
* Call @func for each session in @pool. The result value of @func determines
/**
* gst_rtsp_session_filter:
* @sess: a #GstRTSPSession
- * @func: (scope call): a callback
+ * @func: (scope call) (allow-none): a callback
* @user_data: user data passed to @func
*
* Call @func for each media in @sess. The result value of @func determines
/**
* gst_rtsp_stream_transport_filter:
* @stream: a #GstRTSPStream
- * @func: (scope call): a callback
+ * @func: (scope call) (allow-none): a callback
* @user_data: user data passed to @func
*
* Call @func for each transport managed by @stream. The result value of @func