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