title: Flutter localization without context
body: <p>I am trying to localize my app in flutter. I created the needed string.arb files for the supported languages.</p>
  <p>Why does <code>AppLocalizations.of(context)</code> need a context?</p>
  <p>I simply want to access the named strings in the files/locales files/classes.
  At some point in the app I  build a List and fill it later via overriding some fields with a separate class.</p>
  <p>However, this class has no context but I want to use localized strings in it.
  Can I write a method which gets me the Localization of whatever String I put in?</p>