code: public OptionsBuilder configurationFile(String configFile) {
  		if (configFile != null) {
  			options.put(Options.CONFIGURATION_FILE, new File(configFile));
  		} else {
  			options.remove(Options.CONFIGURATION_FILE);
  		}
  		return this;
  	}
docs: Sets the walkmod configuration file.
  
  @return updated OptionBuilder instance
  
  @see Options#CONFIGURATION_FILE