text: """SQLAlchemy Metadata and Session object"""
  from sqlalchemy import MetaData
  
  __all__ = ['engine', 'metadata', 'Session']
  
  # SQLAlchemy database engine.  Updated by model.init_model().
  engine = None
  
  # SQLAlchemy session manager.  Updated by model.init_model().
  Session = None
  
  # Global metadata. If you have multiple databases with overlapping table 
  # names, you'll need a metadata for each database.
  metadata = MetaData()
  