code: function(oArgs) {
      //TODO: filter for all spurious events at a lower level
      if(!Dom.isAncestor(oArgs.target,Ev.getRelatedTarget(oArgs.event))) {
          this.unhighlightCell(oArgs.target);
      }
  }
docs: Overridable custom event handler to unhighlight cell. Accounts for spurious
  caused-by-child events.
  
  @method onEventUnhighlightCell
  @param oArgs.event {HTMLEvent} Event object.
  @param oArgs.target {HTMLElement} Target element.