code: @Override
      public Predicate equal(Expression<?> lhs, Expression<?> rhs)
      {
          return new ComparisonPredicate(lhs, rhs, ConditionalOperator.EQ);
      }
docs: /*
  (non-Javadoc)
  
  @see
  javax.persistence.criteria.CriteriaBuilder#equal(javax.persistence.criteria
  .Expression, javax.persistence.criteria.Expression)