docs: @Bean(destroyMethod = "close")
  	public DataSource dataSource() {
  		BasicDataSource retVal = new BasicDataSource();
  		retVal.setDriver(new org.apache.derby.jdbc.EmbeddedDriver());
  		retVal.setUrl("jdbc:derby:directory:target/jpaserver_derby_files;create=true");
  		retVal.setUsername("");
  		retVal.setPassword("");
  		return retVal;
  	}