The content you can install in a page is inserted in the body of the page. It would be helpful if it was also possible to insert content into the head of the page, perhaps via an optional 'head' payload, in addition to the 'content' payload.

My use case is that I want to insert CSS as internal styles i.e. <style> ... </style> which can only be inserted in the head of the page. Note I need functionality that can't be deployed using inline styles (i.e. using the HTML style attribute).