public void addAll(ComparisonOperators copy) {
   if (copy.getOperators() != null) {
     getOperators().addAll(copy.getOperators());
   }
 }
 /**
  * Copy the provided ComparisonOperator
  *
  * @param copy
  */
 public ComparisonOperatorsImpl(ComparisonOperators copy) {
   this.operators = new HashSet<Operator>(copy.getOperators());
 }