public DescribedCertificate withActiveDate(java.util.Date activeDate) {
        setActiveDate(activeDate);
        return this;
    }
<p>
An optional date that specifies when the certificate becomes active.
</p>

@param activeDate
       An optional date that specifies when the certificate becomes active.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-transfer/src/main/java/com/amazonaws/services/transfer/model/DescribedCertificate.java