/** Add a name usage to the simplifier's internal cache */
 protected void addUsage(Symbol sym) {
   Name n = sym.getSimpleName();
   List<Symbol> conflicts = nameClashes.get(n);
   if (conflicts == null) {
     conflicts = List.nil();
   }
   if (!conflicts.contains(sym)) nameClashes.put(n, conflicts.append(sym));
 }
 public String simplify(Symbol s) {
   String name = s.getQualifiedName().toString();
   if (!s.type.isCompound()) {
     List<Symbol> conflicts = nameClashes.get(s.getSimpleName());
     if (conflicts == null || (conflicts.size() == 1 && conflicts.contains(s))) {
       List<Name> l = List.nil();
       Symbol s2 = s;
       while (s2.type.getEnclosingType().tag == CLASS && s2.owner.kind == Kinds.TYP) {
         l = l.prepend(s2.getSimpleName());
         s2 = s2.owner;
       }
       l = l.prepend(s2.getSimpleName());
       StringBuilder buf = new StringBuilder();
       String sep = "";
       for (Name n2 : l) {
         buf.append(sep);
         buf.append(n2);
         sep = ".";
       }
       name = buf.toString();
     }
   }
   return name;
 }