WP_CLI::get_config PHP Method

    public static function get_config($key = null)
    {
        if (null === $key) {
            return self::get_runner()->config;
        }
        if (!isset(self::get_runner()->config[$key])) {
            self::warning("Unknown config option '{$key}'.");
            return null;
        }
        return self::get_runner()->config[$key];
    }

 /**
  * Registers just a 'list' and 'run' command to the WC CLI
  * since we only want to enable certain actions on the system status
  * tools endpoints.
  */
 public static function register_commands()
 {
     global $wp_rest_server;
     $request = new WP_REST_Request('OPTIONS', '/wc/v1/system_status/tools');
     $response = $wp_rest_server->dispatch($request);
     $response_data = $response->get_data();
     $parent = "wc tool";
     $supported_commands = array('list', 'run');
     foreach ($supported_commands as $command) {
         $synopsis = array();
         if ('run' === $command) {
             $synopsis[] = array('name' => 'id', 'type' => 'positional', 'description' => __('The id for the resource.', 'woocommerce'), 'optional' => false);
             $method = 'update_item';
             $route = '/wc/v1/system_status/tools/(?P<id>[\\w-]+)';
         } elseif ('list' === $command) {
             $synopsis[] = array('name' => 'fields', 'type' => 'assoc', 'description' => __('Limit response to specific fields. Defaults to all fields.', 'woocommerce'), 'optional' => true);
             $synopsis[] = array('name' => 'field', 'type' => 'assoc', 'description' => __('Get the value of an individual field.', 'woocommerce'), 'optional' => true);
             $synopsis[] = array('name' => 'format', 'type' => 'assoc', 'description' => __('Render response in a particular format.', 'woocommerce'), 'optional' => true, 'default' => 'table', 'options' => array('table', 'json', 'csv', 'ids', 'yaml', 'count', 'headers', 'body', 'envelope'));
             $method = 'list_items';
             $route = '/wc/v1/system_status/tools';
         }
         $before_invoke = null;
         if (empty($command_args['when']) && WP_CLI::get_config('debug')) {
             $before_invoke = function () {
                 if (!defined('SAVEQUERIES')) {
                     define('SAVEQUERIES', true);
                 }
             };
         }
         $rest_command = new WC_CLI_REST_Command('system_status_tool', $route, $response_data['schema']);
         WP_CLI::add_command("{$parent} {$command}", array($rest_command, $method), array('synopsis' => $synopsis, 'when' => !empty($command_args['when']) ? $command_args['when'] : '', 'before_invoke' => $before_invoke));
     }
 }