# File lib/celerity/browser.rb, line 692
    def refresh_handler=(symbol)
      handler = case symbol
                when :waiting
                  HtmlUnit::WaitingRefreshHandler.new
                when :threaded
                  HtmlUnit::ThreadedRefreshHandler.new
                when :immediate
                  HtmlUnit::ImmediateRefreshHandler.new
                else
                  raise ArgumentError, "expected :waiting, :threaded or :immediate"
                end

      @webclient.setRefreshHandler handler
    end