How to create a multi instance camunda subprocess with fluent builder api

I am trying to develop a camunda process, but I don’t know how to implement a multi insntance subprocess to iterate through a collection.

For example:

SubProcess subProcess = modelInstance.getModelElementById(“elementVersionId-” + element.getId().toString());

subProcess.builder().multiInstance().multiInstanceDone() //Cant add a start event after multinstance done

After add a multiInstanceDone to the subprocess i cant start the subprocess with startEvent.

Does anyone have an idea, example to help me?