code: func (db *DB) initBolt(path string) (bool, error) {
  	var err error
  	db.db, err = bolt.Open(path, 0600, nil)
  	if err != nil {
  		return false, err
  	}
  
  	return db.checkMeta()
  }
docs: // initBolt initializes the backing bolt db, checking that the metadata schema
  // version matches what we expect