'blocks' => empty( $arr['content'] ) ? array() : $this->to_array_extra_blocks( $arr['content'] ),
			'images' => empty( $arr['content'] ) ? array() : $this->to_array_extra_images( $arr['content'] ),
		);

		return $arr;
	}

	/**
	 * Add reusable blocks found in the post's content to the post's array
	 *
	 * @since 4.7.0
	 *
	 * @param string $content Raw `post_content` string.
	 * @return array[] {
	 *     Array of reusable block information arrays. The array key is the WP_Post ID of the reusable block.
	 *
	 *     @type string $title   Reusable block title.
	 *     @type string $content Reusable block content.
	 * }
	 */
	protected function to_array_extra_blocks( $content ) {

		$blocks = array();