get_all_services() public method

Gets a list of all available service names and classes
public get_all_services ( $include_custom = true )
 /**
  * Validates that the parameter is a custom sharing service ID like 'custom-1461976264'.
  *
  * @since 4.3.0
  *
  * @param string $value Value to check.
  * @param WP_REST_Request $request
  * @param string $param Name of the parameter passed to endpoint holding $value.
  *
  * @return bool
  */
 public static function validate_custom_service_id($value = '', $request, $param)
 {
     if (!empty($value) && (!is_string($value) || !preg_match('/custom\\-[0-1]+/i', $value))) {
         return new WP_Error('invalid_param', sprintf(esc_html__("%s must be a string prefixed with 'custom-' and followed by a numeric ID.", 'jetpack'), $param));
     }
     if (!class_exists('Sharing_Service') && !@(include JETPACK__PLUGIN_DIR . 'modules/sharedaddy/sharing-service.php')) {
         return new WP_Error('invalid_param', esc_html__('Failed loading required dependency Sharing_Service.', 'jetpack'));
     }
     $sharer = new Sharing_Service();
     $services = array_keys($sharer->get_all_services());
     if (!empty($value) && !in_array($value, $services)) {
         return new WP_Error('invalid_param', sprintf(esc_html__('%s is not a registered custom sharing service.', 'jetpack'), $param));
     }
     return true;
 }