Syntax coloring of MarkupBuilder code

I was wondering if it would be possible for Groovy source editors to recognize method calls to a Builder object and color them differently. I think it would be cool if you could easily see which calls generate a XML element (if you use a XML Builder). While I like the power of the Builder concept, I am a bit worried that my XML generating code could become hard to maintain, because the syntax of the element emitting code is identical to the generating code (loops, calculations, helper methods and such).