recursiveFunction.js

var recursivelyToggle = function recursivelyToggleChildren(array){
    var localArray = array;
    for(var i=0;i<localArray.length;i++){
        var node = localArray[i];
        
        toggleFlag(node); // toggles the flag of the node.
        
        if(node.children){
            node.children = recursivelyToggleChildren(node.children);
        }
    }
    
    return localArray;
};