code: def fit(self, x=None, y=None):
      pass
  
imports: import abc
  from typing import Dict
  import numpy
  from sklearn.base import BaseEstimator
  from lightwood.analysis.nc.util import t_softmax
label_desc: Use image node_id 2 for calling the CachedTSAdapter obj's underlying member method code with example usage: obj.fit(x, y) without return types