public PublicKeyConfig withCallerReference(String callerReference) {
        setCallerReference(callerReference);
        return this;
    }
<p>
A string included in the request to help make sure that the request can't be replayed.
</p>

@param callerReference
       A string included in the request to help make sure that the request can't be replayed.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cloudfront/src/main/java/com/amazonaws/services/cloudfront/model/PublicKeyConfig.java