code: static Object ensureReusableKeystore(AppleServer server, Object keystore) throws KeystoreException {
  		if (keystore instanceof InputStream) keystore = loadKeystore(server, keystore, false);
  		return keystore;
  	}
docs: Make sure that the provided keystore will be reusable.
  
  @param server the server the keystore is intended for
  @param keystore a keystore containing your private key and the certificate signed by Apple (File, InputStream, byte[], KeyStore or String for a file path)
  @return a reusable keystore
  @throws KeystoreException