Issue #3268927 by e0ipso: Allow XDEBUG_TRIGGER in render endpoint

   */

  private function validateProps(array $props, Component $component): void {

    $validator = new Validator();

    $schema = Validator::arrayToObjectRecursive(

      $component->getMetadata()->getSchemas()['props']

    );

    $prop_schema = $component->getMetadata()->getSchemas()['props'];

    // Add an exception for XDEBUG_TRIGGER, so we can debug more comfortably.

    $prop_schema['properties']['XDEBUG_TRIGGER'] = ['type' => 'string'];

    $schema = Validator::arrayToObjectRecursive($prop_schema);

    if (!is_object($schema)) {

      throw new InvalidComponentException('Unable to find schema for component props.');

    }