class_docstr: Class for synthetic or dummy runner.
  
  Currently acts as a shell runner, only creating a name.
code: def __init__(self, dummy_metadata: Optional[str] = None) -> None:
      self.dummy_metadata = dummy_metadata
  
file_path: Ax/ax/runners/synthetic.py
imports: from typing import Any, Dict, Iterable, List, Optional, Set
  from ax.core.base_trial import BaseTrial, TrialStatus
  from ax.core.runner import Runner
label_desc: Use image node_id 1 to create a new SyntheticRunner object from inherited base classes: Runner with example: obj = SyntheticRunner(dummy_metadata)