# File lib/doorkeeper/oauth/refresh_token_request.rb, line 19
      def initialize(server, refresh_token, credentials, parameters = {})
        @server          = server
        @refresh_token   = refresh_token
        @credentials     = credentials
        @original_scopes = parameters[:scope] || parameters[:scopes]
        @refresh_token_parameter = parameters[:refresh_token]

        if credentials
          @client = Application.by_uid_and_secret credentials.uid,
                                                  credentials.secret
        end
      end