code: function (config) {
          // setup the transactions class with adapter config
          Transaction.setup(config);
          Multiplexer.setup(config);
  
          // Call the core registration function.
          return sailsmysql.registerConnection.apply(this, arguments);
      }
docs: Register this adapter when Sails boots up. This additionally initialises the transactional db connection source
  and then goes on to execute the original adapter registration.
  @private
  
  @param config
  @param collections
  @param cb
  @returns {*}