class_docstr: In-memory results.
docstr: Check that fitted strategy exists.
docstr_tok: ["Check","that","fitted","strategy","exists","."]
code: def check_fitted_strategy_exists(
      self, strategy, dataset_name, cv_fold
  ):
      """Check that fitted strategy exists."""
      # for in-memory results, always false, results are always overwritten
      return False
  
imports: import os
  import numpy
  import pandas
  from joblib import load
  from sktime.benchmarking.base import BaseResults, HDDBaseResults, _PredictionsWrapper
label_desc: Use image node_id 7 for calling the RAMResults obj's underlying member method code with example usage: obj.check_fitted_strategy_exists(strategy, dataset_name, cv_fold) and returns: False