[Pharo-users] Preorder tree traversal

[Offray Vladimir Luna Cárdenas]

Hi,

I have a tree object structure, in a project and I'm wondering if there 
is a code or method that I can use to make a preorder tree traversal on 
it. I have seen the one that is the book Inside Smalltalk Vol 1, but I 
don't know if there is something in the image or elsewhere that can be 
used without much/any reimplementation.

So, any pointer to a solution?

Thanks,

Offray