rem: if (event.offsetX <= 10 && element.treeElement.hasChildren) { 
add: if (event.offsetX <= element.treeElement.arrowToggleWidth && element.treeElement.hasChildren) { 
context: TreeElement.treeElementToggled = function(event){    var element = event.currentTarget;    if (!element || !element.treeElement)        return;    if (event.offsetX <= 10 && element.treeElement.hasChildren) {        if (element.treeElement.expanded) {            if (event.altKey)                element.treeElement.collapseRecursively();            else                element.treeElement.collapse();        } else {            if (event.altKey)                element.treeElement.expandRecursively();            else                element.treeElement.expand();        }    }}
meta: 5650	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5650/4ebec25fbb5f422e8e21360baf3ec4968e71b178/treeoutline.js/clean/WebCore/page/inspector/treeoutline.js