code: @Override
      public List<String> getConstraintMapping() {
          List<String> result = new ArrayList<String>();
  
          for (String constraintMappingString : constraintMapping) {
              if (constraintMappingString != null) {
                  constraintMappingString = constraintMappingString.trim();
              }
              result.add(constraintMappingString);
          }
          return result;
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.beanvalidation.config.ValidationConfigurationInterface#getConstraintMapping()