Method getBlockByIndex

src/components/modules/blockManager.ts:655–661

* Returns Block by passed index * * @param {number} index - index to get. -1 to get last * @returns {Block}

(index: number)

   * @returns {Block}
   */
  public getBlockByIndex(index: number): Block | undefined {
    if (index === -1) {
      index = this._blocks.length - 1;
    }

    return this._blocks[index];
  }

  /**
   * Returns an index for passed Block