code: @Override
      public DescribeInstancePatchStatesResult describeInstancePatchStates(DescribeInstancePatchStatesRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeInstancePatchStates(request);
      }
docs: <p>
  Retrieves the high-level patch state of one or more instances.
  </p>
  
  @param describeInstancePatchStatesRequest
  @return Result of the DescribeInstancePatchStates operation returned by the service.
  @throws InternalServerErrorException
  An error occurred on the server side.
  @throws InvalidNextTokenException
  The specified token is not valid.
  @sample AWSSimpleSystemsManagement.DescribeInstancePatchStates
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ssm-2014-11-06/DescribeInstancePatchStates"
  target="_top">AWS API Documentation</a>