check_via

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 93
        def self.check_via(via)
          if via.empty?
            msg = "You should not use the `match` method in your router without specifying an HTTP method.\n"                "If you want to expose your action to both GET and POST, add `via: [:get, :post]` option.\n"                "If you want to expose your action to GET, use `get` in the router:\n"                "  Instead of: match \"controller#action\"\n"                "  Do: get \"controller#action\""
            raise ArgumentError, msg
          end
          via
        end