add htmx headers to response

[gmgreg]

Is there a way to add HTMX headers to a response? In this example below I'd like to include HX-Push-Url in the response headers? I see there's code to generate the headers (https://docs.fastht.ml/api/core.html#htmxresponseheaders) but haven't found a way to inject headers in the response.

e.g.

@rt("/test")
def get():
    page = (
        Button("click me!", 
                  id="click_test", 
                  cls="btn btn-small", 
                  hx_post="/test", 
                  hx_swap="outerHTML", 
                  hx_target="#click_test"
        )
    )

    return page

@rt("/test")
def post():
    page = Button("I'm New!", 
                     hx_post="/test", 
                     cls="btn btn-small")
    headers = {"HX-Push-Url": f"/new/location/", "HX-Trigger":"refresh_history"}
    return page