zend-form comes with an initial set of zend-view helper classes for tasks such as rendering forms, rendering a text input, rendering a selection box, etc.
See the view helpers documentation for more information.
The Zend\Form\View\HelperTrait trait can be used to provide auto-completion for modern IDEs. It defines the aliases of the view helpers in a DocBlock as @method tags.
You may chain as many HelperTrait traits as you like, depending on view helpers from which Zend Framework component you are using and would like to provide auto-completion for.