# File lib/openid/extensions/sreg.rb, line 79
      def initialize(required = nil, optional = nil, policy_url = nil, ns_uri = NS_URI)
        super()

        @policy_url = policy_url
        @ns_uri = ns_uri
        @ns_alias = 'sreg'
        @required = []
        @optional = []

        if required
          request_fields(required, true, true)
        end
        if optional
          request_fields(optional, false, true)
        end
      end