code: public static SslContextBuilder forServer(InputStream keyCertChainInputStream, InputStream keyInputStream) {
          return new SslContextBuilder(true).keyManager(keyCertChainInputStream, keyInputStream);
      }
docs: Creates a builder for new server-side {@link SslContext}.
  
  @param keyCertChainInputStream an input stream for an X.509 certificate chain in PEM format
  @param keyInputStream an input stream for a PKCS#8 private key in PEM format
  @see #keyManager(InputStream, InputStream)