public void setValidityStartTime(java.util.Date validityStartTime) {
        this.validityStartTime = validityStartTime;
    }
<p>
The starting time of validity of the public key.
</p>

@param validityStartTime
       The starting time of validity of the public key.
aws-java-sdk-cloudtrail/src/main/java/com/amazonaws/services/cloudtrail/model/PublicKey.java