public Void execute(CommandContext commandContext) {
Map<String, Object> formProperties = new HashMap<String, Object>();
formProperties.put("formProp1", "value1");
ProcessInstance processInstance = new SubmitStartFormCmd(processDefinitionId, null, formProperties).execute(commandContext);
// two historic details should be in cache: one form property and one variable update
commandContext.getHistoricDetailManager().deleteHistoricDetailsByProcessInstanceId(processInstance.getId());
return null;
}