code: def end(self):
      self.preds = self.clf.predict(self.X_test)
      self.accuracy = accuracy_score(self.y_test, self.preds)
  
file_path: wandb/tests/functional_tests/t0_main/metaflow/wandb-example-flow-decoboth.py
imports: import os
  import pandas
  from metaflow import FlowSpec, Parameter, step
  from sklearn.ensemble import RandomForestClassifier
  from sklearn.metrics import accuracy_score
  from sklearn.model_selection import train_test_split
  from wandb.integration.metaflow import wandb_log
label_desc: Use image node_id 4 for calling the WandbExampleFlowDecoBoth obj's underlying member method code with example usage: obj.end() without return types