docs: @Override
  	public boolean eIsSet(int featureID) {
  		switch (featureID) {
  			case BpsimPackage.COST_PARAMETERS__FIXED_COST:
  				return fixedCost != null;
  			case BpsimPackage.COST_PARAMETERS__UNIT_COST:
  				return unitCost != null;
  		}
  		return super.eIsSet(featureID);
  	}