title: How to customize Doctrine library in my app to work with Timestamp type
body: <p>I'm using Composer with Doctrine in my app, but I need to customize the Doctrine code, changing the Doctrine\DBAL\Platforms\AbstractPlatform and Doctrine\DBAL\Platforms\MySqlPlatform classes.</p>
  
  <p>So, I created the MY_AbstractPlatform and  MY_MySqlPlatform classes in the libraries directory of my app and extend the according superclasses. Then I added in my autoload these classes, but nothing happens.</p>
  
  <p>When I write the code of  Doctrine\DBAL\Platforms\AbstractPlatform and Doctrine\DBAL\Platforms\MySqlPlatform classes directly the implementation is carried out sucessfully, but if I implement the methods in the subclasses nothing happens.</p>
  
  <p>I need to customize the Doctrine library, so anyone can help-me?</p>