old_contents: from django.contrib import admin
  
  # Register your models here.
  
new_contents: from django.contrib import admin
  
  from agendas.models import Meeting, AgendaItem
  
  # Register your models here.
  admin.site.register(Meeting)
  admin.site.register(AgendaItem)
  
subject: add Meetings & AgendaItems to admin site