'''
from django.contrib import admin
from models import ModelBox, ModelSort, ModelExtraButton


class ButtonsInline(admin.StackedInline):
  model = ModelExtraButton
  extra = 2


class ModelBoxAdmin(admin.ModelAdmin):
  inlines = [ButtonsInline]  


admin.site.register(ModelBox, ModelBoxAdmin)
admin.site.register(ModelSort)
admin.site.register(ModelExtraButton)
'''