code: @Override
      public ListAssociationsResult listAssociations(ListAssociationsRequest request) {
          request = beforeClientExecution(request);
          return executeListAssociations(request);
      }
docs: <p>
  Lists the associations for the specified Systems Manager document or instance.
  </p>
  
  @param listAssociationsRequest
  @return Result of the ListAssociations operation returned by the service.
  @throws InternalServerErrorException
  An error occurred on the server side.
  @throws InvalidNextTokenException
  The specified token is not valid.
  @sample AWSSimpleSystemsManagement.ListAssociations
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ssm-2014-11-06/ListAssociations" target="_top">AWS API
  Documentation</a>