# File lib/gherkin/formatter/json_formatter.rb, line 65
      def append_duration(timestamp)
        #check to make sure result exists (scenario outlines do not have results yet)
        if !@current_step_or_hook['result'].nil?
                #convert to nanoseconds
                timestamp = timestamp * 1000000000
                rshash = @current_step_or_hook['result'].to_hash
                rshash['duration'] = timestamp.to_i
                @current_step_or_hook['result'] = rshash
        end
      end