make_filter (OpenID::Yadis)

    # File lib/openid/yadis/filters.rb, line 145
        def self.make_filter(parts)
          # Convert the parts into a list, and pass to mk_compound_filter
          if parts.nil?
            parts = [BasicServiceEndpoint]
          end

          if parts.is_a?(Array)
            return mk_compound_filter(parts)
          else
            return mk_compound_filter([parts])
          end
        end