# File lib/ruote/dboard/process_status.rb, line 351
    def to_s

      '(' + [
        "process_status wfid '#{wfid}'",
        "expressions #{@expressions.size}",
        "stored_workitems #{@stored_workitems.size}",
        "errors #{@errors.size}",
        "schedules #{@schedules.size}",
        "trackers #{@trackers.size}"
      ].join(', ') + ')'
    end