code: def __getitem__(self, item: str):
      if item == "Tree":
          return self.f_tree_mutation_log
      if item == "Model":
          return self.f_model_log
      if item == "In Sample Prediction":
          return self.f_in_sample_prediction_log
      if item in ["Node", "Sigma"]:
          return lambda x: None
      else:
          raise KeyError("No method for key {}".format(item))
  
imports: from typing import Any, Callable
  import numpy
  from .model import Model, deep_copy_model
  from .mutation import TreeMutation
label_desc: Use image node_id 2 for calling the TraceLogger obj's underlying member method code with example usage: obj.__getitem__(item) and returns: self, self, self, function