pub unsafe extern fn XtAppSetWarningMsgHandler(_2: XtAppContext, _1: Option<unsafe extern fn(*mut c_char, *mut c_char, *mut c_char, *mut c_char, *mut *mut c_char, *mut c_uint)>) -> Option<unsafe extern fn(*mut c_char, *mut c_char, *mut c_char, *mut c_char, *mut *mut c_char, *mut c_uint)>