presto-main/src/main/java/io/prestosql/split/SplitManager.java/SplitManager/SplitManager
class SplitManager:    @Inject
    public SplitManager(QueryManagerConfig config, Metadata metadata)
    {
        this.minScheduleSplitBatchSize = config.getMinScheduleSplitBatchSize();
        this.metadata = metadata;
    }