code: @Override
      protected Map<String, List<Object>> mergePersonAttributes(final Map<String, List<Object>> toModify, final Map<String, List<Object>> toConsider) {
          Validate.notNull(toModify, "toModify cannot be null");
          Validate.notNull(toConsider, "toConsider cannot be null");
  
          toModify.putAll(toConsider);
  
          return toModify;
      }
docs: /* (non-Javadoc)
  @see org.jasig.services.persondir.support.merger.BaseAdditiveAttributeMerger#mergePersonAttributes(java.util.Map, java.util.Map)