How to use the @lumino/messaging.ConflatableMessage function in @lumino/messaging

private _queueTransaction(transaction: Datastore.Transaction, type: Datastore.TransactionType): void {
    this._transactionQueue.addLast([transaction, type]);
    MessageLoop.postMessage(this, new ConflatableMessage('queued-transaction'));
  }

export
    const ParentChanged = new Message('parent-changed');

    /**
     * A singleton conflatable `'update-request'` message.
     *
     * #### Notes
     * This message can be dispatched to supporting widgets in order to
     * update their content based on the current widget state. Not all
     * widgets will respond to messages of this type.
     *
     * For widgets with a layout, this message will inform the layout to
     * update the position and size of its child widgets.
     */
    export
    const UpdateRequest = new ConflatableMessage('update-request');

    /**
     * A singleton conflatable `'fit-request'` message.
     *
     * #### Notes
     * For widgets with a layout, this message will inform the layout to
     * recalculate its size constraints to fit the space requirements of
     * its child widgets, and to update their position and size. Not all
     * layouts will respond to messages of this type.
     */
    export
    const FitRequest = new ConflatableMessage('fit-request');

    /**
     * A singleton conflatable `'activate-request'` message.
     *

* update the position and size of its child widgets.
     */
    export
    const UpdateRequest = new ConflatableMessage('update-request');

    /**
     * A singleton conflatable `'fit-request'` message.
     *
     * #### Notes
     * For widgets with a layout, this message will inform the layout to
     * recalculate its size constraints to fit the space requirements of
     * its child widgets, and to update their position and size. Not all
     * layouts will respond to messages of this type.
     */
    export
    const FitRequest = new ConflatableMessage('fit-request');

    /**
     * A singleton conflatable `'activate-request'` message.
     *
     * #### Notes
     * This message should be dispatched to a widget when it should
     * perform the actions necessary to activate the widget, which
     * may include focusing its node or descendant node.
     */
    export
    const ActivateRequest = new ConflatableMessage('activate-request');

    /**
     * A singleton conflatable `'close-request'` message.
     *
     * #### Notes

* This message should be dispatched to a widget when it should
     * perform the actions necessary to activate the widget, which
     * may include focusing its node or descendant node.
     */
    export
    const ActivateRequest = new ConflatableMessage('activate-request');

    /**
     * A singleton conflatable `'close-request'` message.
     *
     * #### Notes
     * This message should be dispatched to a widget when it should close
     * and remove itself from the widget hierarchy.
     */
    export
    const CloseRequest = new ConflatableMessage('close-request');
  }

  /**
   * A message class for child related messages.
   */
  export
  class ChildMessage extends Message {
    /**
     * Construct a new child message.
     *
     * @param type - The message type.
     *
     * @param child - The child widget for the message.
     */
    constructor(type: string, child: Widget) {
      super(type);

/**
     * The size of the edge dock zone for the root panel, in pixels.
     */
    bottom: 40,

    /**
     * The size of the edge dock zone for the root panel, in pixels.
     */
    left: 40
  };

  /**
   * A singleton `'layout-modified'` conflatable message.
   */
  export
  const LayoutModified = new ConflatableMessage('layout-modified');

  /**
   * An object which holds mouse press data.
   */
  export
  interface IPressData {
    /**
     * The handle which was pressed.
     */
    handle: HTMLDivElement;

    /**
     * The X offset of the press in handle coordinates.
     */
    deltaX: number;

beginTransaction(): string {
    let newVersion = this._context.version + 1;
    let id = this._transactionIdFactory(newVersion, this.id);
    this._initTransaction(id, newVersion);
    MessageLoop.postMessage(this, new ConflatableMessage('transaction-begun'));
    return id;
  }

* its child widgets, and to update their position and size. Not all
     * layouts will respond to messages of this type.
     */
    export
    const FitRequest = new ConflatableMessage('fit-request');

    /**
     * A singleton conflatable `'activate-request'` message.
     *
     * #### Notes
     * This message should be dispatched to a widget when it should
     * perform the actions necessary to activate the widget, which
     * may include focusing its node or descendant node.
     */
    export
    const ActivateRequest = new ConflatableMessage('activate-request');

    /**
     * A singleton conflatable `'close-request'` message.
     *
     * #### Notes
     * This message should be dispatched to a widget when it should close
     * and remove itself from the widget hierarchy.
     */
    export
    const CloseRequest = new ConflatableMessage('close-request');
  }

  /**
   * A message class for child related messages.
   */
  export