Returns the rendered value for the inputted template name.
        
        :param      template | <str>

def render(self, template, fail='## :todo: add {template}'):
        """
        Returns the rendered value for the inputted template name.
        
        :param      template | <str>
        """
        try:
            return self._templates[template].render(scaffold=self)
        except KeyError:
            return fail.format(template=template)