docs: @Override
      void completeCandidates(CommandContext ctx, String buffer, int cursor, List<String> candidates) {
          boolean quoted = buffer.startsWith("\"");
          if (candidates.size() == 1) {
              // Escaping must occur in all cases.
              // if quoted, only " will be escaped.
              EscapeSelector escSelector = quoted
                      ? QUOTES_ONLY_ESCAPE_SELECTOR : ESCAPE_SELECTOR;
              candidates.set(0, Util.escapeString(candidates.get(0), escSelector));
          }
      }