code: @SuppressWarnings("null")
    private IntegratorProtocol getIntegratorProtocol(ValueMap properties) {
      IntegratorProtocol protocol = IntegratorProtocol.AUTO;
      try {
        String protocolString = properties.get(IntegratorNameConstants.PN_INTEGRATOR_PROTOCOL, String.class);
        if (StringUtils.isNotEmpty(protocolString)) {
          protocol = IntegratorProtocol.valueOf(protocolString.toUpperCase());
        }
      }
      catch (IllegalArgumentException ex) {
        // ignore
      }
      return protocol;
    }
docs: Read integrator protocol from content container. Default to AUTO.
  @param properties Content container
  @return Integrator protocol