Currently, every algorithm-specific asymmetric key interface (Ex: `ECKey`) in JDK has a `getParams()` method. It will be nice if this method is in `PublicKey` and `PrivateKey` (returning null by default) or a superclass so that it's available for all asymmetric keys. Once we have this method, even if a new algorithm is introduced in a future release, developers do not need to rewrite their applications to use any new algorithm-specific API.