x11::xt::XtAppSetWarningMsgHandler

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