public <KeyT extends Key, SerializationT extends Serialization> boolean hasSerializerForKey(
      KeyT key, Class<SerializationT> serializationClass) {
    return registry.get().hasSerializerForKey(key, serializationClass);
  }
Returns true if a parser for this {@code serializedKey} has been registered.
java_src/src/main/java/com/google/crypto/tink/internal/MutableSerializationRegistry.java