private static Method findMethodOnClasspath(String targetClass, String methodSignature) {
    try {
      // use bootstrap classloader to only provide access to JRE classes
      Class cls = new ClassLoader(null) {}.loadClass(targetClass);
      for (Method mtd : cls.getMethods()) {
        // use contains() to ignore access modifiers and thrown exceptions
        if (mtd.toString().contains(methodSignature)) {
          return mtd;
        }
      }
    }
    catch (Exception e) {
      // ignore
    }
    return null;
  }
private static Method findMethodOnClasspath(String targetClass, String methodSignature)