Router                  Router object.
error                   Return an error page.
mime_type               Compute mime type from file extension.
pass                    Pass on this match and defer to next.
redirect                Redirect to new url.
render                  Send output to browser...
render_brew             Render template using brew.
render_json             Produce JSON from an R object...
route_matcher           Generate functions to match specified route.
route_re                Parse route (with parameters) into regular
                        expression.
static_file             Send static file to browser, if present.
