delete(key, callback) {
    this.db.unset(key);
    this._write();
    callback(null);
  }
/**
   * Deletes an entry from the connector.
   *
   * @param   {String}   key
   * @param   {Function} callback Will be called with null for successful deletions or with
   *                     an error message string
   *
   * @returns {void}
   */
Deletes an entry from the connector.
@param   {String}   key
@param   {Function} callback Will be called with null for successful deletions or with
an error message string

@returns {void}
Deletes an entry from the connector . @param { String } key @param { Function } callback Will be called with null for successful deletions or with an error message string @returns { void }
delete(key, callback) {
    this.db.unset(key);
    this._write();
    callback(null);
  }
delete ( key , callback ) { this . db . unset ( key ) ; this . _write ( ) ; callback ( null ) ; }
Deletes an entry from the connector.
Deletes an entry from the connector .