code: def __get__(self, instance: object, cls: type[U]) -> QuerySet[U]:
      return QuerySet(cls, cls._get_collection())
  
file_path: datasets-server/jobs/mongodb_migration/src/mongodb_migration/database_migrations.py
imports: import types
  from typing import Generic, TypeVar
  from mongoengine import Document
  from mongoengine.fields import StringField
  from mongoengine.queryset.queryset import QuerySet
  from mongodb_migration.constants import DATABASE_MIGRATIONS_COLLECTION_MIGRATIONS, DATABASE_MIGRATIONS_MONGOENGINE_ALIAS
label_desc: Use image node_id 1 for calling the QuerySetManager obj's underlying member method code with example usage: obj.__get__(instance, cls) and returns: QuerySet