code: function(oRecord) {
          if(oRecord) {
              for(var i=this._records.length-1; i>-1; i--) {
                  if(this._records[i] && oRecord.getId() === this._records[i].getId()) {
                      return i;
                  }
              }
          }
          return null;
  
      }
docs: Returns current position index for the given Record.
  
  @method getRecordIndex
  @param oRecord {YAHOO.widget.Record} Record instance.
  @return {Number} Record's RecordSet position index.