webapp_json-8.x-1.0-beta3/webapp.module

<?php

/**
 * @file
 * Adds support for serializing entities to Hypertext Application Language.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function webapp_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.webapp':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('WebApp provides JSON formatted content for Web Applications.') . '</p>';
      return $output;
  }
}