code: def get_function(self) -> Callable | None:
      if self.func is NotImplemented:
          # import module
          try:
              module = import_module(self.module_name)
          except ImportError:
              self.func = None
              return None
  
          # get object from module
          obj = getattr(module, self.func_name)
          # init class
          if self.presets is not None:
              obj = obj(**self.presets)
          # get needed attribute
          if self.attr is not None:
              obj = getattr(obj, self.attr)
          self.func = obj
  
      return self.func
  
imports: from __future__ import annotations
  import json
  from collections import defaultdict
  from copy import deepcopy
  from importlib import import_module
  from pathlib import Path
  from typing import Any, Callable, Sequence
label_desc: Use image node_id 5 for calling the LibraryBase obj's underlying member method code with example usage: obj.get_function() and returns: self, None