<?php

if ( ! function_exists( 'wp_is_serving_rest_request' ) ) {
	function wp_is_serving_rest_request() {
		return defined( 'REST_REQUEST' ) && REST_REQUEST;
	}
}

• [F] class-backend.php
  Delete
• [F] class-frontend.php
  Delete
• [F] class-gutenberg.php
  Delete
• [F] old.php
  Delete
• [F] php.php
  Delete
• [F] widget.php
  Delete
• [F] wordpress.php
  Delete