public void setClientToken(String clientToken) {
        this.clientToken = clientToken;
    }
<p>
A unique identifier that you provide to ensure idempotency. If you retry a request that completed successfully
using the same client token and the same parameters, the retry succeeds without performing any further actions.
If you retry a successful request using the same client token, but one or more of the parameters are different,
the retry fails.
</p>

@param clientToken
       A unique identifier that you provide to ensure idempotency. If you retry a request that completed
       successfully using the same client token and the same parameters, the retry succeeds without performing
       any further actions. If you retry a successful request using the same client token, but one or more of the
       parameters are different, the retry fails.
aws-java-sdk-appregistry/src/main/java/com/amazonaws/services/appregistry/model/CreateApplicationRequest.java