TestService.php

<?php

namespace Drupal\autowire_test;

use Drupal\Core\Database\Connection;
use Drupal\Core\DrupalKernelInterface;
class TestService {
    
    /**
     * @var \Drupal\autowire_test\TestInjectionInterface
     */
    protected $testInjection;
    
    /**
     * @var \Drupal\autowire_test\TestInjection2
     */
    protected $testInjection2;
    
    /**
     * The database connection.
     */
    protected $database;
    
    /**
     * The Drupal kernel.
     */
    protected $kernel;
    public function __construct(TestInjectionInterface $test_injection, TestInjection2 $test_injection2, Connection $database, DrupalKernelInterface $kernel, TestInjectionInterface $testInjection3) {
        $this->testInjection = $test_injection;
        $this->testInjection2 = $test_injection2;
        $this->database = $database;
        $this->kernel = $kernel;
    }
    public function getTestInjection() : TestInjectionInterface {
        return $this->testInjection;
    }
    public function getTestInjection2() : TestInjection2 {
        return $this->testInjection2;
    }
    public function getTestInjection3() : TestInjection3 {
        return $this->testInjection3;
    }
    public function getDatabase() : Connection {
        return $this->database;
    }
    public function getKernel() : DrupalKernelInterface {
        return $this->kernel;
    }

}