public Builder withKeyStorePath(String keyStorePath){
  properties.setProperty(NettyOptions.SSL_KEY_STORE_PATH,Assert.notNull(keyStorePath,"keyStorePath"));
  return this;
}

public Builder withKeyStorePath ( String keyStorePath ) { properties . setProperty ( NettyOptions . SSL_KEY_STORE_PATH , Assert . notNull ( keyStorePath , "keyStorePath" ) ) ; return this ; }
sets the ssl key store path .
