I use include() to reuse code. How to reuse code in nette?

<?php

namespace App\Presenters;

class CustomClass
{
    private $database;

    public function __construct($database)
    {
        $this->database = $database;

    }//end mtd

    public function returnTitle()
    {
        $title = $this->database->table("posts")
                ->where("id = ?", 1);

        return $title;

    }//end mtd

}//end class

<?php

namespace App\Presenters;

use Nette;

class TitlePresenter extends BasePresenter
{
    private $database;

    public function __construct(Nette\Database\Context $database)
    {
        $this->database = $database;
    }//end mtd

    public function renderDefault()
    {
        $titleObject = new CustomClass($this->database);
        $this->template->title = $titleObject->returnTitle();
    }//end mtd

}//end class

{block}
    {foreach $title as $row}
        {$row->title}
    {/foreach}
{/block}

<?php
//this class(service) queries the database
namespace App\Presenters;

use Nette;

class Title
{
    private $connection;

    function __construct(Nette\Database\Connection $connection)
    {
        $this->connection = $connection;
    }//end mtd


    function returnTitle(){

        return $this->connection->query("SELECT title FROM posts WHERE id = ?", 1);

    }//end mtd

}//end class

<?php
//this class(container) returns an object and takes care of the dependencies
namespace App\Presenters;

use Nette;

class Container
{
    function createConnection()
    {
        return new Nette\Database\Connection('mysql:host=127.0.0.1;dbname=quickstart', 'root', '');
    }//end mtd

    function createTitle()
    {
        return new Title($this->createConnection());
    }//end mtd

}//end class

<?php
//this class(presenter) creates an object(container) which creates another object(service) that can returnTitle to the presenter
namespace App\Presenters;

class TitlePresenter extends BasePresenter
{
    public function renderDefault()
    {
        $container = new Container;
        $title = $container->createTitle();
        $this->template->result = $title->returnTitle();
    }//end mtd

}//end class