code: function feedbackEvtCallback( evt ) {
    log( "pong-feedback", "feedbackEvtCallback" )
    if ( evt && evt.text ) {
      log( "pong-feedback", "feedbackEvtCallback "+evt.text )
      if ( pongLastFeedbackTxt.indexOf( evt.text ) >= 0 ) {
        if ( evt.text.length > 0 ) {
          var feedbackTxt =  $.i18n( evt.text )
          var evtNo = pongLastFeedbackTxt.indexOf( feedbackTxt )
          pongLastFeedbackCnt[evtNo] = pongLastFeedbackCnt[evtNo] + 1
          pongLastFeedbackTim[evtNo] = new Date()
          moveToLastFeetback( evtNo )
        }
      } else {
        if ( evt.text.length > 0 ) {
          var feedbackTxt =  $.i18n( evt.text )
          
          pongLastFeedbackTxt.shift()
          pongLastFeedbackTxt.push( feedbackTxt )
          
          pongLastFeedbackCnt.shift()
          pongLastFeedbackCnt.push( 1 )
  
          pongLastFeedbackTim.shift()
          pongLastFeedbackTim.push( new Date() )
        }
      }
    } 
    updateFeedback()
  }
docs: The callback is subscribed for feedback events