match_head_routes

# File actionpack/lib/action_dispatch/journey/router.rb, line 135
        def match_head_routes(routes, req)
          verb_specific_routes = routes.select(&:requires_matching_verb?)
          head_routes = match_routes(verb_specific_routes, req)

          if head_routes.empty?
            begin
              req.request_method = "GET"
              match_routes(routes, req)
            ensure
              req.request_method = "HEAD"
            end
          else
            head_routes
          end
        end