close() {
    return this[PRIVATE.connection].then((database) => {
      return database.close()
    })
  }
/**
   * Terminates the connection to the database as soon as possible. The
   * returned promise will resolve once the connection has been terminated.
   *
   * @return {Promise<undefined>} A promise that will resolve once the
   *         connection has been terminated.
   */
Terminates the connection to the database as soon as possible. The
returned promise will resolve once the connection has been terminated.

@return {Promise} A promise that will resolve once the
connection has been terminated.
Terminates the connection to the database as soon as possible . The returned promise will resolve once the connection has been terminated . @return { Promise } A promise that will resolve once the connection has been terminated .
close() {
    return this[PRIVATE.connection].then((database) => {
      return database.close()
    })
  }
close ( ) { return this [ PRIVATE . connection ] . then ( ( database ) => { return database . close ( ) } ) }
Terminates the connection to the database as soon as possible.
Terminates the connection to the database as soon as possible .