@Override public String toString(){
  StringBuffer retval=new StringBuffer();
  appendErrors(retval,requestErrors);
  appendErrors(retval,dataErrors);
  return retval.toString();
}

@ Override public String toString ( ) { StringBuffer retval = new StringBuffer ( ) ; appendErrors ( retval , requestErrors ) ; appendErrors ( retval , dataErrors ) ; return retval . toString ( ) ; }
returns a convenient text representation , for debugging .
