code: @Override
      CollationKey generateKey() {
          String k = name() + flatSignature() + typeParametersString();
          // ',' and '&' are between '$' and 'a':  normalize to spaces.
          k = k.replace(',', ' ').replace('&', ' ');
          // System.out.println("COLLATION KEY FOR " + this + " is \"" + k + "\"");
          return env.doclocale.collator.getCollationKey(k);
      }
docs: Generate a key for sorting.