From what I can see, the global object is called "Qv" but in some places "Qva" is used, for example in the example for how to use the AddExtension function:
Qva.LoadCSS(Qva.Remote + (Qva.Remote.indexOf('?') >= 0 ? '&' : '?') + 'public=only' + '&name=' + "Extensions/MyCompanyName/MyExtensionName/MyStyles.css");
What is the difference between these objects, and where can I find the documentation about it?