connection.list(listData, set)

Creates an instance of List if available, otherwise creates Map.List if available.

This will add properties on the raw listData array to the created list instance. e.g:

var listData = [{id: 1, name:"do dishes"}, ...];
listData.loadedFrom; // "shard 5"

var todoList = todoConnection.list(listData, {});
todoList.loadedFrom; // "shard 5"