Cannnot retract objects in business central

Issue

• I have deployed my rule-project and created restful-endpoint container using the business-central tool. I want to execute commands to the restful end-point using the kie-server-client maven dependency in a java client-app. I want to insert an object, then fire all rules and then I want to retract the object that I inserted.

• I am using org.kie.internal.command.CommandFactory class to create my command objects. For example, I can create a InsertObjectCommand, FireAllRulesCommand and BatchExecutionCommand and send these to the rule-engine with KieServicesClient.

• Unfortunately, I do not know how to send RetractCommand in order to remove my inserted fact object from the knowledge session.

• According to this documentation, I should be able to create a RetractCommand. I noticed that I have to create new RetractCommand() instead of using CommandFactory, but i cannot find the RetractCommand class.