Autocomplete support for Symfony\Component\Translation\t

[julien-lmnr]

Hi,

I would like to request the addition of an autocomplete feature for the Symfony\Component\Translation\t function that simplifies the use of the translation system, especially for TranslatableMessage.

Currently, the autocomplete for translation keys works well with new TranslatableMessage(), but it seems that t, which is a shortcut alternative, is not supported by the plugin for the autocomplete of keys and translation domains.

Thank you for your excellent work on this very useful plugin.

[Haehnchen]

done via #2306