如何在一个django应用程序中拥有多个sitemap类？

# myapp/sitemaps.py
from django.contrib.sitemaps import Sitemap
from django.urls import reverse

from myapp.models import MyModel1, MyModel2

class MyModel1Sitemap(Sitemap):
    def items(self):
        return MyModel1.objects.all()

    def location(self, obj):
        return reverse('mymodel1_detail', args=[obj.pk])

class MyModel2Sitemap(Sitemap):
    def items(self):
        return MyModel2.objects.all()

    def location(self, obj):
        return reverse('mymodel2_detail', args=[obj.pk])

# myapp/urls.py
from django.contrib.sitemaps.views import sitemap
from myapp.sitemaps import MyModel1Sitemap, MyModel2Sitemap

sitemaps = {
    'mymodel1': MyModel1Sitemap,
    'mymodel2': MyModel2Sitemap,
}

urlpatterns = [
    # ...
    path('sitemap.xml', sitemap, {'sitemaps': sitemaps}, name='django.contrib.sitemaps.views.sitemap'),
    # ...
]