docs: protected boolean evaluateManualActivationRule(CmmnActivityExecution execution) {
      boolean manualActivation = false;
      CmmnActivity activity = execution.getActivity();
      Object manualActivationRule = activity.getProperty(PROPERTY_MANUAL_ACTIVATION_RULE);
      if (manualActivationRule != null) {
        CaseControlRule rule = (CaseControlRule) manualActivationRule;
        manualActivation = rule.evaluate(execution);
      }
      return manualActivation;
    }