netbox-community-netbox/netbox/virtualization/apps.py

from django.apps import AppConfig


class VirtualizationConfig(AppConfig):
    name = 'virtualization'

    def ready(self):
        from . import search, signals
        from .models import VirtualMachine
        from utilities.counters import connect_counters

        # Register counters
        connect_counters(VirtualMachine)