There was a discussion on the slack community channel about what is currently the correct way to use ez_image_alias (with translation support) seeing that it requires a field object to be used, and ez_field_value() doesn't return what we need.

This would be a simple new twig helper, called ez_field() and it would be largely the same as getTranslatedFieldValue() except it would return the whole Field, not just the value.

I have a PR (at least the needed changes in ContentExtension) almost ready. Just creating this ticket before hand so that I can mention it in the commit.

Here's the PR now: https://github.com/ezsystems/ezpublish-kernel/pull/1548