public void setLastUpdatedAt(java.util.Date lastUpdatedAt) {
        this.lastUpdatedAt = lastUpdatedAt;
    }
<p>
The date and time that the target group was last updated, specified in ISO-8601 format.
</p>

@param lastUpdatedAt
       The date and time that the target group was last updated, specified in ISO-8601 format.
aws-java-sdk-vpclattice/src/main/java/com/amazonaws/services/vpclattice/model/TargetGroupSummary.java