code: function mute (conn) {
    if (!conn.db) throw new Error('missing db');
    conn.db.removeAllListeners("close");
    conn.db.removeAllListeners("error");
    conn.db.removeAllListeners("timeout");
    conn.db.removeAllListeners("open");
    conn.db.removeAllListeners("fullsetup");
    conn._listening = false;
  }
docs: /*!
  Remove listeners registered in `listen`