code: public void setExtension(boolean newExtension)
  	{
  		boolean oldExtension = extension;
  		extension = newExtension;
  		if (eNotificationRequired())
  			eNotify(new ENotificationImpl(this, Notification.SET, XtypePackage.XIMPORT_DECLARATION__EXTENSION, oldExtension, extension));
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated