code: public ErrorMap getErrorMap()
              throws ChaiUnavailableException
      {
          final VendorFactory entryFactory = getChaiProvider().getDirectoryVendor().getVendorFactory();
          return entryFactory.getErrorMap();
      }
docs: Returns a {@code ChaiUser} instance representing the supplied <i>userDN</i>.
  
  @return A valid {@code ChaiUser}
  @throws ChaiUnavailableException If the directory server(s) are unavailable