code: protected void handleExtraOptions() {
      indexVectorLength = argOptions.getIntOption('l');
  
      // Load the permutation function if one is specified.
      if (argOptions.hasOption('p'))
        permFunction = ReflectionUtil.getObjectInstance(
            argOptions.getStringOption('p'));
  
      // Create an index map.
      if (argOptions.hasOption('L'))
        indexMap = loadObject(openLoadFile());
      else 
        indexMap = new GeneratorMap<TernaryVector>(new RandomIndexVectorGenerator(
          indexVectorLength));
  
      // Load the index map from file if one was specified.
    }
docs: {@inheritDoc}.