api.decorateWidget - ¿cómo puedo encontrar los nombres de las plantillas?

Thank you for the hint! I found the necessary part user-card-post-names:after.

I tried to use it in the original code, but failed.

I changed poster-name:after to user-card-post-names:after, but it didnt work and the custom field is not visible on the usercard. Any ideas on the reason of that?