presto-resource-group-managers/src/main/java/io/prestosql/plugin/resourcegroups/db/MysqlDaoProvider.java/MysqlDaoProvider/MysqlDaoProvider
class MysqlDaoProvider:    @Inject
    public MysqlDaoProvider(DbResourceGroupConfig config)
    {
        requireNonNull(config, "DbResourceGroupConfig is null");
        MysqlDataSource dataSource = new MysqlDataSource();
        dataSource.setURL(requireNonNull(config.getConfigDbUrl(), "resource-groups.config-db-url is null"));
        this.dao = Jdbi.create(dataSource)
                .installPlugin(new SqlObjectPlugin())
                .onDemand(ResourceGroupsDao.class);
    }