### Question:
FieldUtils { public static Object getPrivateField(Class<?> clazz, Object target, String fieldName) { Field field = ReflectionUtils.findField(clazz, fieldName); if (field != null) { ReflectionUtils.makeAccessible(field); return ReflectionUtils.getField(field, target); } return null; }  static Object getPrivateField(Class<?> clazz, Object target, String fieldName);  }### Answer:
@Test public void testGetPrivateField() { Feign.Builder builder = Feign.builder(); Request.Options options = (Request.Options) FieldUtils.getPrivateField(Feign.Builder.class, builder, "options"); Assert.assertNotNull(options); System.out.println(options.connectTimeoutMillis() + ":" + options.readTimeoutMillis()); }