code: public boolean isIdentifierTypeProperty(String inputProperty) {
          // initialize the return value
          boolean returnValue = false;
          // test the property
          if ((inputProperty != null)
              && ((inputProperty.equals(Service.PROP_UNIQUE_ID)) || (inputProperty.equals(Service.PROP_UNIQUE_NAME))
                  || (inputProperty.equals(Service.PROP_EXTERNAL_ID)) || (inputProperty.equals(Service.PROP_EXTERNAL_NAME)))) {
              returnValue = true;
          }
          return returnValue;
      }
docs: Test to see if a property is an IdentifierType property.
  
  @param inputProperty Property to test.
  
  @return true if the property is an IdentifierType property, false otherwise.
  
  @pre inputProperty != null