class_docstr: Helper to copy parameters from args to state.
  
  Can be helpful if some other transformation were performed on the args (i.e. feature generator)
  and the modified args has to be stored for other purposes
  
  Parameters
  ----------
  params_mapping: Dict[str, str]
      mapping between args and state keys to be copied. I.e. `{'a': 'b'}` means `state.b = args.a`
  parent: Optional[AbstractAnalysis], default = None
      parent Analysis
  children: Optional[List[AbstractAnalysis]], default None
      wrapped analyses; these will receive sampled `args` during `fit` call
  state: AnalysisState
      state to be updated by this fit function
  kwargs
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code: def _fit(
      self, state: AnalysisState, args: AnalysisState, **fit_kwargs
  ) -> None:
      for key_args, key_state in self.params_mapping.items():
          state[key_state] = args[key_args]
  
imports: from __future__ import annotations
  import logging
  from abc import ABC, abstractmethod
  from typing import Dict, Generator, List, Optional, Tuple
  from pandas import DataFrame
  from ..state import AnalysisState, StateCheckMixin
label_desc: Use image node_id 3 for calling the SaveArgsToState obj's underlying member method code with example usage: obj._fit(state, args) without return types