public void setLastDriftCheckTimestamp(java.util.Date lastDriftCheckTimestamp) {
        this.lastDriftCheckTimestamp = lastDriftCheckTimestamp;
    }
<p>
Most recent time when CloudFormation performed a drift detection operation on the stack set. This value will be
<code>NULL</code> for any stack set on which drift detection hasn't yet been performed.
</p>

@param lastDriftCheckTimestamp
       Most recent time when CloudFormation performed a drift detection operation on the stack set. This value
       will be <code>NULL</code> for any stack set on which drift detection hasn't yet been performed.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/StackSetSummary.java