code: public void setParam(XExpression newParam)
  	{
  		if (newParam != param)
  		{
  			NotificationChain msgs = null;
  			if (param != null)
  				msgs = ((InternalEObject)param).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - XbasePackage.XSYNCHRONIZED_EXPRESSION__PARAM, null, msgs);
  			if (newParam != null)
  				msgs = ((InternalEObject)newParam).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - XbasePackage.XSYNCHRONIZED_EXPRESSION__PARAM, null, msgs);
  			msgs = basicSetParam(newParam, msgs);
  			if (msgs != null) msgs.dispatch();
  		}
  		else if (eNotificationRequired())
  			eNotify(new ENotificationImpl(this, Notification.SET, XbasePackage.XSYNCHRONIZED_EXPRESSION__PARAM, newParam, newParam));
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated