@Override
  public boolean equals(Object obj) {
    if (obj instanceof HystrixInvocationHandler) {
      HystrixInvocationHandler other = (HystrixInvocationHandler) obj;
      return target.equals(other.target);
    }
    return false;
  }
Process all methods in the target so that appropriate setters are created.
hystrix/src/main/java/feign/hystrix/HystrixInvocationHandler.java