docs: function(id, registrationName, listener) {
      ("production" !== process.env.NODE_ENV ? invariant(
        !listener || typeof listener === 'function',
        'Expected %s listener to be a function, instead got type %s',
        registrationName, typeof listener
      ) : invariant(!listener || typeof listener === 'function'));
  
      var bankForRegistrationName =
        listenerBank[registrationName] || (listenerBank[registrationName] = {});
      bankForRegistrationName[id] = listener;
    }