code: public boolean finalizeNativeLibs(final ClassLoader cl) throws ValidatorManagerException {
      boolean res = false;
      final Class classClassLoader = ClassLoader.class;
      java.lang.reflect.Field nativeLibraries = null;
      try {
        nativeLibraries = classClassLoader.getDeclaredField("nativeLibraries");
      } catch (final NoSuchFieldException e) {
        throw new ValidatorManagerException(e);
      }
      if (nativeLibraries == null) {
        return res;
      }
      nativeLibraries.setAccessible(true);
      Object obj = null;
      try {
        obj = nativeLibraries.get(cl);
      } catch (final IllegalAccessException e) {
        throw new ValidatorManagerException(e);
      }
      if (!(obj instanceof Vector)) {
        return res;
      }
      res = true;
      final Vector java_lang_ClassLoader_NativeLibrary = (Vector) obj;
      for (final Object lib : java_lang_ClassLoader_NativeLibrary) {
        java.lang.reflect.Method finalize = null;
        try {
          finalize = lib.getClass().getDeclaredMethod("finalize", new Class[0]);
        } catch (final NoSuchMethodException e) {
          throw new ValidatorManagerException(e);
        }
        if (finalize != null) {
          finalize.setAccessible(true);
          try {
            finalize.invoke(lib, new Object[0]);
          } catch (final IllegalAccessException e) {
            throw new ValidatorManagerException(e);
          } catch (final InvocationTargetException e) {
            throw new ValidatorManagerException(e);
          }
        }
      }
      return res;
    }
docs: finalize native libraries