@Override public void error(String msg,Throwable t){
  if (logger.isLoggable(Level.SEVERE)) {
    log(SELF,Level.SEVERE,msg,t);
  }
}

@ Override public void error ( String msg , Throwable t ) { if ( logger . isLoggable ( Level . SEVERE ) ) { log ( SELF , Level . SEVERE , msg , t ) ; } }
log an exception ( throwable ) at the severe level with an accompanying message .
