Function gst_ message_ new_ have_ context 
Source pub unsafe extern "C" fn gst_message_new_have_context(
    src: *mut GstObject,
    context: *mut GstContext,
) -> *mut GstMessagepub unsafe extern "C" fn gst_message_new_have_context(
    src: *mut GstObject,
    context: *mut GstContext,
) -> *mut GstMessage