_onFabricMouseUp(fEvent) {
    const { target } = fEvent;
    const newClickTime = new Date().getTime();

    if (this._isDoubleClick(newClickTime) && !target.isEditing) {
      target.enterEditing();
    }

    if (target.isEditing) {
      this.fire(events.TEXT_EDITING); // fire editing text event
    }

    this._lastClickTime = newClickTime;
  }
Fabric mouseup event handler
@param {fabric.Event} fEvent - Current mousedown event on selected object
@private