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