anchor.diff:      let prefix = ""
       EmitMembers flavor prefix EmitScope.InstanceOnly i
       EmitConstants i
  -    EmitEventHandlers prefix i
  +    EmitEventHandlers flavor prefix i
       EmitIndexers EmitScope.InstanceOnly i
   
       Pt.decreaseIndent()
  
positive.code: 
  let EmitDomWorker () =
      ignoreDOMTypes <- true
      EmitTheWholeThing Flavor.Worker GlobalVars.tsWorkerOutput
negative.code:         | Some i' -> EmitAllMembers flavor i'
          | _ -> ()
  
  let EmitEventHandlers (flavor: Flavor) (prefix: string) (i:Browser.Interface) =
      let emitEventHandler prefix (eHandler: EventHandler)  =
          let eventType =
              getEventTypeInInterface eHandler.EventName i.Name
          Pt.printl
              "%saddEventListener(type: \"%s\", listener: (%s, ev: %s) => any, useCapture?: boolean): void;"
              prefix eHandler.EventName (EmitEventHandlerThis (flavor, prefix)) eventType
  
      let fPrefix = if prefix.StartsWith "declare var" then "declare function " else ""
  
  