code: public static Set<String> parseIds2ConfigFile(String... ids) {
          Set<String> configFiles = Sets.newLinkedHashSet();
          configFiles.add(DEFAULT_APP_CONF);
  
          if (ids != null && ids.length > 0) {
              String[] conf = DEFAULT_APP_CONF.split("\\.");
              String idPrefix = conf[0];
              String idSuffix = "." + conf[1];
  
              for (String id : ids) {
                  if (StringUtils.isNotBlank(id)) {
                      String confFile = idPrefix + "_" + id + idSuffix;
                      configFiles.add(confFile);
                  }
              }
          }
          return configFiles;
      }
docs: <p>parseIds2ConfigFile.</p>
  
  @param ids a {@link java.lang.String} object.
  @return a {@link java.util.Set} object.