code: @Override
      public DescribeInstancesHealthResult describeInstancesHealth(DescribeInstancesHealthRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeInstancesHealth(request);
      }
docs: <p>
  Retrieves detailed information about the health of instances in your AWS Elastic Beanstalk. This operation
  requires <a href="https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/health-enhanced.html">enhanced health
  reporting</a>.
  </p>
  
  @param describeInstancesHealthRequest
  Parameters for a call to <code>DescribeInstancesHealth</code>.
  @return Result of the DescribeInstancesHealth operation returned by the service.
  @throws InvalidRequestException
  One or more input parameters is not valid. Please correct the input parameters and try the operation
  again.
  @throws ElasticBeanstalkServiceException
  A generic service exception has occurred.
  @sample AWSElasticBeanstalk.DescribeInstancesHealth
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/elasticbeanstalk-2010-12-01/DescribeInstancesHealth"
  target="_top">AWS API Documentation</a>