code: @Override
      public <T> Expression<T> function(String arg0, Class<T> arg1, Expression<?>... arg2)
      {
          // TODO Auto-generated method stub
          return null;
      }
docs: /*
  (non-Javadoc)
  
  @see
  javax.persistence.criteria.CriteriaBuilder#function(java.lang.String,
  java.lang.Class, javax.persistence.criteria.Expression<?>[])