public String getDriftStatus() {
        return this.driftStatus;
    }
<p>
Status of the stack set's actual configuration compared to its expected template and parameter configuration. A
stack set is considered to have drifted if one or more of its stack instances have drifted from their expected
template and parameter configuration.
</p>
<ul>
<li>
<p>
<code>DRIFTED</code>: One or more of the stack instances belonging to the stack set stack differs from the
expected template and parameter configuration. A stack instance is considered to have drifted if one or more of
the resources in the associated stack have drifted.
</p>
</li>
<li>
<p>
<code>NOT_CHECKED</code>: CloudFormation hasn't checked the stack set for drift.
</p>
</li>
<li>
<p>
<code>IN_SYNC</code>: All the stack instances belonging to the stack set stack match from the expected template
and parameter configuration.
</p>
</li>
<li>
<p>
<code>UNKNOWN</code>: This value is reserved for future use.
</p>
</li>
</ul>

@return Status of the stack set's actual configuration compared to its expected template and parameter
        configuration. A stack set is considered to have drifted if one or more of its stack instances have
        drifted from their expected template and parameter configuration.</p>
        <ul>
        <li>
        <p>
        <code>DRIFTED</code>: One or more of the stack instances belonging to the stack set stack differs from
        the expected template and parameter configuration. A stack instance is considered to have drifted if one
        or more of the resources in the associated stack have drifted.
        </p>
        </li>
        <li>
        <p>
        <code>NOT_CHECKED</code>: CloudFormation hasn't checked the stack set for drift.
        </p>
        </li>
        <li>
        <p>
        <code>IN_SYNC</code>: All the stack instances belonging to the stack set stack match from the expected
        template and parameter configuration.
        </p>
        </li>
        <li>
        <p>
        <code>UNKNOWN</code>: This value is reserved for future use.
        </p>
        </li>
@see StackDriftStatus
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/StackSetSummary.java