Positional factory function for class io.pedestal.http.route.map_tree.MapRouter.

Factory function for class io.pedestal.http.route.map_tree.MapRouter, taking a map of keywords to field values.

Given the full sequence of route-maps,
return a single map, keyed by path, whose value is a function matching on the req.
The function takes a request, matches criteria and constraints, and returns
the most specific match.
This function only processes the routes if all routes are static.

Given a sequence of routes, return a router which satisfies the
io.pedestal.http.route.router/Router protocol.