title: How to save Doctrine2 Entity
body: <p>How to save Doctrine2 Entity if all fields are private? Is there some kind of mechanism to do that?</p>
  
  <p>How can I save this:</p>
  
  <pre><code>/**
   * @Entity
   */
  class SomeEntity
  {
      /** @Id @Column(type="integer") @GeneratedValue */
      private $id;
  
      /** @Column */
      private $title;
  
  }
  </code></pre>
  
  <p>How to change <code>title</code> for example? Maybe it's possible via EntityManager?</p>
  
  <p>PS: Thanks in advance</p>