code: def get_support_infra(self) -> Set[str]:
      raise NotImplementedError(
          "`get_support_infra` is not implemented!"
      )
  
imports: from __future__ import annotations
  from abc import abstractmethod
  from typing import Any, Set, Tuple, TYPE_CHECKING, Union
  import numpy
  from qlib.utils.time import epsilon_change
  import warnings
  import pandas
  from ..data.data import Cal
label_desc: Use image node_id 2 for calling the BaseInfrastructure obj's underlying member method code with example usage: obj.get_support_infra() without return types