# File lib/grape/endpoint.rb, line 336
    def lazy_initialize!
      return true if @lazy_initialized

      @lazy_initialize_lock.synchronize do
        return true if @lazy_initialized

        @helpers = build_helpers.tap { |mod| self.class.send(:include, mod) }
        @app = options[:app] || build_stack(@helpers)

        @lazy_initialized = true
      end
    end