%
% save the tree if changed, load the tree content
% stack: pep-name
%
true exch
*treeacts
/*
nod@?
{
%
% tree changed, save it
%
 "Save" *persists
}
{
%
% safe to load tree
%
 "Load" *persists
} ifelse
*/

%
% for sure tree has proper saved content
%