Walks the entire tree looking for the first item that matches given @equal_func and @key.
The first parameter to @equal_func will always be @key. The second parameter will be the nodes #DzlTreeNode:item property.
A #GEqualFunc
the key for @equal_func
A #DzlTreeNode or %NULL.
See Implementation
Walks the entire tree looking for the first item that matches given @equal_func and @key.
The first parameter to @equal_func will always be @key. The second parameter will be the nodes #DzlTreeNode:item property.