Method getStackGroup

packages/core/src/undo_manager/index.ts:326–339

* Get grouped undo manager stack. * The difference between `getStack` is when you do multiple operations at a time, * like appending multiple components: * `editor.getWrapper().append(' C1 C2 ');` * `getStack` will return a collection length of 2. * `getStackGroup`

()

   * @private
   */
  getStackGroup() {
    const result: any = [];
    const inserted: any = [];

    this.getStack().forEach((item: any) => {
      const index = item.get('magicFusionIndex');
      if (inserted.indexOf(index) < 0) {
        inserted.push(index);
        result.push(item);
      }
    });

    return result;
  }

  /**
   * Execute the provided callback temporarily stopping tracking changes