public OptionGroup withCopyTimestamp(java.util.Date copyTimestamp) {
        setCopyTimestamp(copyTimestamp);
        return this;
    }
<p>
Indicates when the option group was copied.
</p>

@param copyTimestamp
       Indicates when the option group was copied.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/OptionGroup.java