public void setParentId(String parentId) {
        this.parentId = parentId;
    }
<p>
The unique identifier (ID) for the parent root or organization unit (OU) whose accounts you want to list.
</p>

@param parentId
       The unique identifier (ID) for the parent root or organization unit (OU) whose accounts you want to list.
aws-java-sdk-organizations/src/main/java/com/amazonaws/services/organizations/model/ListAccountsForParentRequest.java