public String[] getServerAliases(String keyType, Principal[] issuers) {
   return keyManager.getServerAliases(keyType, issuers);
 }
 public X509Certificate[] getCertificateChain(String alias) {
   return keyManager.getCertificateChain(alias);
 }
 public PrivateKey getPrivateKey(String alias) {
   return keyManager.getPrivateKey(alias);
 }
 public String chooseServerAlias(String keyType, Principal[] issuers) {
   return keyManager.chooseServerAlias(keyType, issuers);
 }