# File lib/rack/mount/analysis/splitting.rb, line 51
      def process_key(requirements, method, requirement)
        separators = separators(method)
        if requirement.is_a?(Regexp) && separators.any?
          generate_split_keys(requirement, separators).each_with_index do |value, index|
            requirements[Key.new(method, index, Regexp.union(*separators))] = value
          end
        else
          super
        end
      end