@Override
    public boolean instanceMatches(String textId, long numericId) {
      if (ip == null) {
        return true;
      } else {
        Matcher m = ip.matcher(textId);
        if (m.matches()) {
          return true;
        }
        m = ip.matcher(String.valueOf(numericId));
        return m.matches();
      }
    }
Returns the contents located at the end of the file as a string.

@throws IOException if the file can not be opened or read
geode-core/src/main/java/org/apache/geode/internal/SystemAdmin.java