presto-main/src/main/java/io/prestosql/split/RecordPageSourceProvider.java/RecordPageSourceProvider/createPageSource
class RecordPageSourceProvider:    @Override
    public ConnectorPageSource createPageSource(ConnectorTransactionHandle transaction, ConnectorSession session, ConnectorSplit split, ConnectorTableHandle table, List<ColumnHandle> columns)
    {
        return new RecordPageSource(recordSetProvider.getRecordSet(transaction, session, split, table, columns));
    }