presto-resource-group-managers/src/main/java/io/prestosql/plugin/resourcegroups/db/DbResourceGroupConfig.java/DbResourceGroupConfig/setConfigDbUrl
class DbResourceGroupConfig:    @Config("resource-groups.config-db-url")
    public DbResourceGroupConfig setConfigDbUrl(String configUrl)
    {
        this.configUrl = configUrl;
        return this;
    }