code: def get_active_aggregators() -> List[MetersDict]:
      return list(_active_aggregators.values())
  
imports: import contextlib
  import uuid
  from collections import defaultdict
  from typing import Callable, List, Optional
  from .meters import *
label_desc: Use image node_id 3 for calling a global function with example usage: get_active_aggregators() and returns: list