code: @Override
      public ConfirmProductInstanceResult confirmProductInstance(ConfirmProductInstanceRequest request) {
          request = beforeClientExecution(request);
          return executeConfirmProductInstance(request);
      }
docs: <p>
  Determines whether a product code is associated with an instance. This action can only be used by the owner of
  the product code. It is useful when a product code owner must verify whether another user's instance is eligible
  for support.
  </p>
  
  @param confirmProductInstanceRequest
  @return Result of the ConfirmProductInstance operation returned by the service.
  @sample AmazonEC2.ConfirmProductInstance
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/ConfirmProductInstance" target="_top">AWS API
  Documentation</a>