code: def groupby(self):
      json_path = self._get_path("groupby")
      groupby_specs = nested_get(self, json_path)
      cols = [
          self.query_generator.key_to_server_path(k)
          for k in groupby_specs
      ]
      return [self.pm_query_generator.back_to_front(c) for c in cols]
  
imports: from typing import Any, Dict, Optional, TypeVar
  from ..public import Api
  from ..public import PythonMongoishQueryGenerator, QueryGenerator, Runs
  from .util import Attr, Base, coalesce, generate_name, nested_get, nested_set
label_desc: Use image node_id 6 for calling the Runset obj's underlying member method code with example usage: obj.groupby() and returns: unknown