docs: @Override
  	public boolean eIsSet(int featureID)
  	{
  		switch (featureID)
  		{
  			case SarlPackage.SARL_ASSERT_EXPRESSION__CONDITION:
  				return condition != null;
  			case SarlPackage.SARL_ASSERT_EXPRESSION__MESSAGE:
  				return MESSAGE_EDEFAULT == null ? message != null : !MESSAGE_EDEFAULT.equals(message);
  			case SarlPackage.SARL_ASSERT_EXPRESSION__IS_STATIC:
  				return isStatic != IS_STATIC_EDEFAULT;
  		}
  		return super.eIsSet(featureID);
  	}