@Override
  public X509Certificate[] getCertificateChain(final String s) {
    if (!StringUtils.isEmpty(keyAlias)) {
      return delegate.getCertificateChain(keyAlias);
    }
    return delegate.getCertificateChain(s);
  }
Constructor.

@param mgr The X509KeyManager used as a delegate
@param keyAlias The alias name of the server's keypair and supporting certificate chain
geode-core/src/main/java/org/apache/geode/internal/net/filewatch/ExtendedAliasKeyManager.java