Method validateIndex

src/components/modules/api/blocks.ts:415–427

* Validated block index and throws an error if it's invalid * * @param index - index to validate

(index: unknown)

   * @param index - index to validate
   */
  private validateIndex(index: unknown): void {
    if (typeof index !== 'number') {
      throw new Error('Index should be a number');
    }

    if (index < 0) {
      throw new Error(`Index should be greater than or equal to 0`);
    }

    if (index === null) {
      throw new Error(`Index should be greater than or equal to 0`);
    }
  }
}