    # File lib/rack/auth/digest/md5.rb, line 24
            def initialize(app, realm=nil, opaque=nil, &authenticator)
              @passwords_hashed = nil
              if opaque.nil? and realm.respond_to? :values_at
                realm, opaque, @passwords_hashed = realm.values_at :realm, :opaque, :passwords_hashed
              end
              super(app, realm, &authenticator)
              @opaque = opaque
            end