Generates a static HTML with the rendered object in the
        supplied format. Allows supplying a template formatting string
        with fields to interpolate 'js', 'css' and the main 'html'.

def static_html(self, obj, fmt=None, template=None):
        """
        Generates a static HTML with the rendered object in the
        supplied format. Allows supplying a template formatting string
        with fields to interpolate 'js', 'css' and the main 'html'.
        """
        js_html, css_html = self.html_assets()
        if template is None: template = static_template
        html = self.html(obj, fmt)
        return template.format(js=js_html, css=css_html, html=html)