public <SerializationT extends Serialization> Key parseKey(
      SerializationT serializedKey, @Nullable SecretKeyAccess access)
      throws GeneralSecurityException {
    return registry.get().parseKey(serializedKey, access);
  }
Parses the given serialization into a Key.

<p>This will look up a previously registered parser for the passed in {@code SerializationT}
class, and the used object identifier (as indicated by {@code
serializedKey.getObjectIdentifier()}), and then parse the object with this parsers.
java_src/src/main/java/com/google/crypto/tink/internal/MutableSerializationRegistry.java