AcceptHeaderMatcher example

  protected $matcher;

  /** * {@inheritdoc} */
  protected function setUp(): void {
    parent::setUp();

    $this->fixtures = new RoutingFixtures();
    $this->matcher = new AcceptHeaderMatcher();
  }

  /** * Provides data for the Accept header filtering test. * * @see Drupal\Tests\Core\Routing\AcceptHeaderMatcherTest::testAcceptFiltering() */
  public function acceptFilterProvider() {
    return [
      // Check that JSON routes get filtered and prioritized correctly.       ['application/json, text/xml;q=0.9', 'json', 'route_c', 'route_e'],