modifying render() to prevent recursion?

modification assistance request:
Are there any suggestions about how to modify panini.render() to
1. allow a page content template (page.html) to include itself i.e. {{> body}}
2. but prevent infinite recursive rendering.

right now, that will result in a render loop.

advice?

or, alternatively, a way to access the rendered body - the var page in render() or better yet, the partial 'body' - from other helpers?