code: @Override
      public ListGroupCertificateAuthoritiesResult listGroupCertificateAuthorities(ListGroupCertificateAuthoritiesRequest request) {
          request = beforeClientExecution(request);
          return executeListGroupCertificateAuthorities(request);
      }
docs: Retrieves the current CAs for a group.
  
  @param listGroupCertificateAuthoritiesRequest
  @return Result of the ListGroupCertificateAuthorities operation returned by the service.
  @throws BadRequestException
  invalid request
  @throws InternalServerErrorException
  server error
  @sample AWSGreengrass.ListGroupCertificateAuthorities
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/greengrass-2017-06-07/ListGroupCertificateAuthorities"
  target="_top">AWS API Documentation</a>