docs: public void setUnitCost(Parameter newUnitCost) {
  		if (newUnitCost != unitCost) {
  			NotificationChain msgs = null;
  			if (unitCost != null)
  				msgs = ((InternalEObject)unitCost).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - BpsimPackage.COST_PARAMETERS__UNIT_COST, null, msgs);
  			if (newUnitCost != null)
  				msgs = ((InternalEObject)newUnitCost).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - BpsimPackage.COST_PARAMETERS__UNIT_COST, null, msgs);
  			msgs = basicSetUnitCost(newUnitCost, msgs);
  			if (msgs != null) msgs.dispatch();
  		}
  		else if (eNotificationRequired())
  			eNotify(new ENotificationImpl(this, Notification.SET, BpsimPackage.COST_PARAMETERS__UNIT_COST, newUnitCost, newUnitCost));
  	}