code: def to_json(self):
      return {
          "name": self.name,
          "base_dir": self.base_dir,
          "sources": [s.to_json() for s in self.sources],
          "repositories": [r.to_json() for r in self.repositories],
          "dependencies": [d.to_json() for d in self.dependencies],
      }
  
imports: import hashlib
  import json
  import os
  import sqlalchemy
  from sqlalchemy.ext.declarative import declarative_base
  from sacred.dependencies import get_digest
  from sacred.serializer import restore
label_desc: Use image node_id 2 for calling the Experiment obj's underlying member method code with example usage: obj.to_json() and returns: dict