gistfile1.txt

<?php

namespace Drupal\Blog\Controller;

use Drupal\Core\Controller\ControllerBase;
use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
use Drupal\Core\Template\TwigEnvironment;

class DefaultController extends ControllerBase implements ContainerInjectionInterface {

  protected $twig;

  /**
   * helloAction
   * @param  string $name Get
   * @return [type]       [description]
   */
  public function helloAction($name) {
    return "Hello " . $name . "!";
  }

  public function __construct(TwigEnvironment $twig) {
    $this->twig = $twig;
  }

  public static function create(ContainerInterface $container){
    return new static(
      $container->get('twig')    );
  }
}