Testing if an NSTreeNode is a descendant of another

gistfile1.m

- (BOOL)ks_isDescendantOfNode:(NSTreeNode *)aNode;
{
    NSTreeNode *testNode = self;
    while (testNode)
    {
        if (testNode == aNode) return YES;
        testNode = [testNode parentNode];
    }
    
    return NO;
}