public String getLastOperationId() {
        return this.lastOperationId;
    }
<p>
The last unique ID of a StackSet operation performed on a stack instance.
</p>

@return The last unique ID of a StackSet operation performed on a stack instance.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/StackInstanceSummary.java