code: public static ConfigurationOptionBuilder<Map<Pattern, String>> regexMapOption() {
  		return new ConfigurationOptionBuilder<Map<Pattern, String>>(MapValueConverter.REGEX_MAP_VALUE_CONVERTER, Map.class)
  				.defaultValue(Collections.<Pattern, String>emptyMap());
  	}
docs: Constructs a {@link ConfigurationOptionBuilder} whose value is of type {@link Map}&lt;{@link Pattern}, {@link
  String}&gt;
  
  @return a {@link ConfigurationOptionBuilder} whose value is of type {@link Map}&lt;{@link Pattern}, {@link
  String}&gt;