/**
  * Constructs a new DescribeInstanceAttributeRequest object. Callers should use the setter or
  * fluent setter (with...) methods to initialize any additional object members.
  *
  * @param instanceId The ID of the instance.
  * @param attribute The instance attribute.
  */
 public DescribeInstanceAttributeRequest(String instanceId, String attribute) {
   setInstanceId(instanceId);
   setAttribute(attribute);
 }