what does 'Module' mean?

[sknightq]

I can't find the document of unityloader.js. I only found some snippets of code in following url.

var myGame = UnityLoader.instantiate("gameContainerId", "http://mydomain/myfolder/Build/mygame.json", {onProgress: myProgress, Module: {TOTAL_MEMORY: 0x20000000}});

But I still don't know what it's meaning.