docs: def local_session(factory):
      """Cache a session thread local for up to 45m"""
      factory_region = getattr(factory, 'region', 'global')
      s = getattr(CONN_CACHE, factory_region, {}).get('session')
      t = getattr(CONN_CACHE, factory_region, {}).get('time')
  
      n = time.time()
      if s is not None and t + (60 * 45) > n:
          return s
      s = factory()
  
      setattr(CONN_CACHE, factory_region, {'session': s, 'time': n})
      return s