_onObjectAdded(objectProps) {
    /**
     * The event when object added
     * @event ImageEditor#objectAdded
     * @param {ObjectProps} props - object properties
     * @example
     * imageEditor.on('objectAdded', function(props) {
     *     console.log(props);
     * });
     */
    this.fire(OBJECT_ADDED, objectProps);

    /**
     * The event when object added (deprecated)
     * @event ImageEditor#addObjectAfter
     * @param {ObjectProps} props - object properties
     * @deprecated
     */
    this.fire(ADD_OBJECT_AFTER, objectProps);
  }
'objectAdded' event handler
@param {Object} objectProps added object properties
@private