code: def to_dict(self):
      return dict(
          metadata=self._metadata,
          graph_structure=self.graph_structure,
          states={s: v.to_dict() for s, v in self.states.items()},
          dag_instantiation_params=self._dag_instantiation_params.serialize(),
          file_path=self._file_path,
          metaflow_params=self.metaflow_params,
      )
  
imports: import hashlib
  import json
  import sys
  import platform
  from collections import defaultdict
  from datetime import datetime, timedelta
label_desc: Use image node_id 4 for calling the Workflow obj's underlying member method code with example usage: obj.to_dict() and returns: dict