class_docstr: HDD results.
docstr: Check that predictions exist.
docstr_tok: ["Check","that","predictions","exist","."]
code: def check_predictions_exist(
      self, strategy_name, dataset_name, cv_fold, train_or_test
  ):
      """Check that predictions exist."""
      path = (
          self._generate_key(
              strategy_name, dataset_name, cv_fold, train_or_test
          )
          + ".csv"
      )
      if os.path.isfile(path):
          return True
      else:
          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 6 for calling the HDDResults obj's underlying member method code with example usage: obj.check_predictions_exist(strategy_name, dataset_name, cv_fold, train_or_test) and returns: True, False