code: func (db *memDB) Save(c *Container) error {
  	return db.withTxn(func(txn *memdb.Txn) error {
  		return txn.Insert(memdbContainersTable, c)
  	})
  }
docs: // Save atomically updates the in-memory store state for a Container.
  // Only read only (deep) copies of containers may be passed in.