Function gst_ play_ message_ parse_ muted_ changed 
Source pub unsafe extern "C" fn gst_play_message_parse_muted_changed(
    msg: *mut GstMessage,
    muted: *mut gboolean,
)pub unsafe extern "C" fn gst_play_message_parse_muted_changed(
    msg: *mut GstMessage,
    muted: *mut gboolean,
)