code: @Override
    public String[] getFileSuffixes() {
      String[] suffixes = filterEmptyStrings(settings.getStringArray(GroovyPlugin.FILE_SUFFIXES_KEY));
      if (suffixes.length == 0) {
        suffixes = StringUtils.split(GroovyPlugin.DEFAULT_FILE_SUFFIXES, ",");
      }
      return addDot(suffixes);
    }
docs: {@inheritDoc}
  
  @see org.sonar.api.resources.AbstractLanguage#getFileSuffixes()