code: public static String getVariableTranslator(String className) throws IOException {
          if (getVariableTranslators() != null) {
              String newTranslator = getVariableTranslators().get(className);
              if (newTranslator != null)
                  return newTranslator;
          }
          return className;
      }
docs: If the className argument needs to be mapped to a new variable translator class,
  returns the new class name; otherwise returns the unmodified argument.