old_contents: from django.contrib import admin
  
  from apps.polls.models import Poll
  
  class PollAdmin(admin.ModelAdmin):
      fieldsets = [
          (None, {'fields': ['question']}),
          ('Date information', {'fields': ['pub_date']}),
      ]
  
  
  admin.site.register(Poll, PollAdmin)
new_contents: from django.contrib import admin
  
  from apps.polls.models import Poll
  
  class PollAdmin(admin.ModelAdmin):
      fieldsets = [
          (None, {'fields': ['question']}),
          ('Date information', {'fields': ['pub_date'], 'classes': ['collapse']}),
      ]
  
  
  admin.site.register(Poll, PollAdmin)
subject: Add 'classes': ['collapse']