macOS NSTreeController allObjects?

[BollywooD]

how do I return an NSArray of all the root objects in my NSTreeController?
this should be simple?

this is the code I have tried....

NSArray *myArray = [[self myTreeController] allObjects];

and this:

NSArray * myArray = [myTreeController content];

Im stumped....

 

[BollywooD]

Doh!

NSMutableArray * myArray = [NSMutableArray array];
	for (id node in [myTreeController content])
	{
		[myArray addObject:[node valueForKey:@"key"]];
	}
	return myArray;