code: @Override
      public DescribeInstanceAttributeResult describeInstanceAttribute(DescribeInstanceAttributeRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeInstanceAttribute(request);
      }
docs: <p>
  Describes the specified attribute of the specified instance. You can specify only one attribute at a time. Valid
  attribute values are: <code>instanceType</code> | <code>kernel</code> | <code>ramdisk</code> |
  <code>userData</code> | <code>disableApiTermination</code> | <code>instanceInitiatedShutdownBehavior</code> |
  <code>rootDeviceName</code> | <code>blockDeviceMapping</code> | <code>productCodes</code> |
  <code>sourceDestCheck</code> | <code>groupSet</code> | <code>ebsOptimized</code> | <code>sriovNetSupport</code>
  </p>
  
  @param describeInstanceAttributeRequest
  @return Result of the DescribeInstanceAttribute operation returned by the service.
  @sample AmazonEC2.DescribeInstanceAttribute
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DescribeInstanceAttribute" target="_top">AWS
  API Documentation</a>