silverstripe/silverstripe-framework — pull request #2793 by a2nt (2014-01-21 12:29:22+00:00)
Title: [IMPROVEMENT] CompositeField push stacks

Let's u make push call stacks for a example:
```php
$fields->findOrMakeTab('Root')->push(
Tab::create('BlaTab','Bla Bla')
->push(TextField::create('Bla-ble','Bla-bla'))
);
```