This returns a "live" version of the mixin. The live version generates the code skeleton and then accepts a list of HTML strings that go between the code to output. This way, you can read the diet template at runtime, and if any non-code changes are made, you can avoid recompilation.
This is like getHTMLMixin, but returns only the NON-code portions of the diet
template. The usage is for the DietLiveMode, which can update the HTML
portions of the diet template at runtime without requiring a recompile.