public AssociateFileSystemRequest withClientToken(String clientToken) {
        setClientToken(clientToken);
        return this;
    }
<p>
A unique string value that you supply that is used by the FSx File Gateway to ensure idempotent file system
association creation.
</p>

@param clientToken
       A unique string value that you supply that is used by the FSx File Gateway to ensure idempotent file
       system association creation.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-storagegateway/src/main/java/com/amazonaws/services/storagegateway/model/AssociateFileSystemRequest.java