code: def create_run(
      self, runhash: str, created_at: datetime = None
  ) -> Run:
      run = ModelMappedRun.from_hash(
          runhash,
          created_at,
          session=self._session or self.get_session(),
      )
      run.experiment = "default"
      return run
  
imports: from aim.storage.structured.entities import ObjectFactory, Run, Experiment, Tag, RunCollection, ExperimentCollection, TagCollection
  from aim.storage.structured.sql_engine.entities import ModelMappedRun, ModelMappedExperiment, ModelMappedTag
  from typing import List
  from datetime import datetime
label_desc: Use image node_id 9 for calling the ModelMappedFactory obj's underlying member method code with example usage: obj.create_run(runhash, created_at) and returns: run