public void setParentId(String parentId) {
        this.parentId = parentId;
    }
<p>
For nested stacks--stacks created as resources for another stack--the stack ID of the direct parent of this
stack. For the first level of nested stacks, the root stack is also the parent stack.
</p>
<p>
For more information, see <a
href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-nested-stacks.html">Working with
Nested Stacks</a> in the <i>CloudFormation User Guide</i>.
</p>

@param parentId
       For nested stacks--stacks created as resources for another stack--the stack ID of the direct parent of
       this stack. For the first level of nested stacks, the root stack is also the parent stack.</p>
       <p>
       For more information, see <a
       href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-nested-stacks.html">Working
       with Nested Stacks</a> in the <i>CloudFormation User Guide</i>.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/StackSummary.java