code: func (f StringField) Get() (val string, err error) {
  	b, err := f.db.Get(f.key)
  	if err != nil {
  		if err == leveldb.ErrNotFound {
  			return "", nil
  		}
  		return "", err
  	}
  	return string(b), nil
  }
docs: // Get returns a string value from database.
  // If the value is not found, an empty string is returned
  // an no error.