public/javascripts/yui/dom/dom-debug.js
function(node) {
            node = Y.Dom.get(node);
            return Y.Dom.getLastChildBy(node);
        }
function(node) {
            node = Y.Dom.get(node);
            return Y.Dom.getLastChildBy(node);
        }
function ( node ) { node = Y . Dom . get ( node ) ; return Y . Dom . getLastChildBy ( node ) ; }
Returns the last HTMLElement child.
@method getLastChild
@param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
@return {Object} HTMLElement or null if not found
Returns the last HTMLElement child .