# File lib/grape/endpoint.rb, line 176
    def prepare_routes_requirements
      endpoint_requirements = options[:route_options][:requirements] || {}
      all_requirements = (namespace_stackable(:namespace).map(&:requirements) << endpoint_requirements)
      all_requirements.reduce({}) do |base_requirements, single_requirements|
        base_requirements.merge!(single_requirements)
      end
    end