public DeregisterAppInstanceUserEndpointRequest withEndpointId(String endpointId) {
        setEndpointId(endpointId);
        return this;
    }
<p>
The unique identifier of the <code>AppInstanceUserEndpoint</code>.
</p>

@param endpointId
       The unique identifier of the <code>AppInstanceUserEndpoint</code>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-chimesdkidentity/src/main/java/com/amazonaws/services/chimesdkidentity/model/DeregisterAppInstanceUserEndpointRequest.java