context: qx.Proto._updateScrollBarVisibility = function() {  if (this.isSeeable()) {    var horBar = qx.ui.table.TablePaneScroller.HORIZONTAL_SCROLLBAR;    var verBar = qx.ui.table.TablePaneScroller.VERTICAL_SCROLLBAR;    var scrollerArr = this._getPaneScrollerArr();      // Check which scroll bars are needed    var horNeeded = false;    var verNeeded = false;    for (var i = 0; i < scrollerArr.length; i++) {      var isLast = (i == (scrollerArr.length - 1));        // Only show the last vertical scrollbar      var bars = scrollerArr[i].getNeededScrollBars(horNeeded, !isLast);      if (bars & horBar) {        horNeeded = true;      }      if (isLast && (bars & verBar)) {        verNeeded = true;      }    }      // Set the needed scrollbars    for (var i = 0; i < scrollerArr.length; i++) {      var isLast = (i == (scrollerArr.length - 1));        // Only show the last vertical scrollbar      scrollerArr[i].setHorizontalScrollBarVisible(horNeeded);      scrollerArr[i].setVerticalScrollBarVisible(isLast && verNeeded);    }  }};
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