Seeing undefined for some stores

[kristian-puccio]

I can only see data for one of my stores.

I am using immutable.js and also I am doing an isomorphic render of the app.
An interesting point is that the store that is showing data is the only one I can serialising back to the client. All the other stores I have an empty dehydrate and rehydrate functions:

    dehydrate() {
        return undefined;
    }

    rehydrate() {
        // do nothing! so we don't wipe our fetched viewers state with server data.
    }