code: public java.util.List<String> getEc2InstanceIds() {
          if (ec2InstanceIds == null) {
              ec2InstanceIds = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return ec2InstanceIds;
      }
docs: <p>
  A list of the EC2 instances that the Elastic Load Balancing instance is managing traffic for.
  </p>
  
  @return A list of the EC2 instances that the Elastic Load Balancing instance is managing traffic for.