private static void init(String exceptionClassName) throws NoSuchFieldException, ClassNotFoundException {
    Class<?> exceptionClass = Class.forName(exceptionClassName, false, ComparisonFailureData.class.getClassLoader());
    final Field expectedField = exceptionClass.getDeclaredField("fExpected");
    expectedField.setAccessible(true);
    EXPECTED.put(exceptionClass, expectedField);

    final Field actualField = exceptionClass.getDeclaredField("fActual");
    actualField.setAccessible(true);
    ACTUAL.put(exceptionClass, actualField);
  }
private static void init(String exceptionClassName)