public CreateFHIRDatastoreRequest withClientToken(String clientToken) {
        setClientToken(clientToken);
        return this;
    }
<p>
Optional user provided token used for ensuring idempotency.
</p>

@param clientToken
       Optional user provided token used for ensuring idempotency.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-healthlake/src/main/java/com/amazonaws/services/healthlake/model/CreateFHIRDatastoreRequest.java