public String getStackDriftStatus() {
        return this.stackDriftStatus;
    }
<p>
Status of the stack's actual configuration compared to its expected configuration.
</p>
<ul>
<li>
<p>
<code>DRIFTED</code>: The stack differs from its expected template configuration. A stack is considered to have
drifted if one or more of its resources have drifted.
</p>
</li>
<li>
<p>
<code>NOT_CHECKED</code>: CloudFormation hasn't checked if the stack differs from its expected template
configuration.
</p>
</li>
<li>
<p>
<code>IN_SYNC</code>: The stack's actual configuration matches its expected template configuration.
</p>
</li>
<li>
<p>
<code>UNKNOWN</code>: This value is reserved for future use.
</p>
</li>
</ul>

@return Status of the stack's actual configuration compared to its expected configuration.</p>
        <ul>
        <li>
        <p>
        <code>DRIFTED</code>: The stack differs from its expected template configuration. A stack is considered
        to have drifted if one or more of its resources have drifted.
        </p>
        </li>
        <li>
        <p>
        <code>NOT_CHECKED</code>: CloudFormation hasn't checked if the stack differs from its expected template
        configuration.
        </p>
        </li>
        <li>
        <p>
        <code>IN_SYNC</code>: The stack's actual configuration matches its expected template 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/DescribeStackDriftDetectionStatusResult.java