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

@param validityStartTime
       The starting time of validity of the public key.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cloudtrail/src/main/java/com/amazonaws/services/cloudtrail/model/PublicKey.java