code: public static VOMSTrustStore newTrustStore(List<String> localTrustDirs,
      long updateFrequency, VOMSTrustStoreStatusListener statusListener) {
  
      return new DefaultUpdatingVOMSTrustStore(localTrustDirs, updateFrequency,
        statusListener);
    }
docs: Creates a {@link VOMSTrustStore} configured according to the parameters
  passed as argument
  
  @param localTrustDirs
  the directory where voms information will be searched
  @param updateFrequency
  the trust store update frequency in milliseconds
  @param statusListener
  a listener that is notified of events related to the created trust
  store
  @return a {@link VOMSTrustStore} configured as requested.