Function gstreamer_rtsp_sys::gst_rtsp_message_get_header_by_name

pub unsafe extern "C" fn gst_rtsp_message_get_header_by_name(
    msg: *mut GstRTSPMessage,
    header: *const c_char,
    value: *mut *mut c_char,
    index: c_int,
) -> GstRTSPResult