%
% save the tree if changed, load the tree content
% stack: pep-name
%
true exch
*freeacts
Tree.Changed?
{
%
% tree changed, save it
%
 "Fave" *persists
}
{
%
% safe to load tree
%
 "Foad" *persists
} ifelse
%
% for sure tree has proper saved content
%