Leaderboard Example Outdated?

[rbaindourov]

How viable is this leaderboard example still?

I tried to put its contents into a meteor package and saw that ReactMeteor is undefined.

What is the difference between React.createClass and ReactMeteor.createClass and how to bridge the gap with a mixin?

Basically wondering if there a mixin other than mixins: [ReactMeteorData] that mutates the React.createClass object into whatever you have in the example?

Because adding that mixin ( mixins: [ReactMeteorData] ) throws an error requiring that getMeteorData return an expected object.