Function gstreamer_sdp_sys::gst_sdp_message_parse_keymgmt

pub unsafe extern "C" fn gst_sdp_message_parse_keymgmt(
    msg: *const GstSDPMessage, 
    mikey: *mut *mut GstMIKEYMessage
) -> GstSDPResult

This is supported on crate feature v1_8_1 only.