presto-spi/src/main/java/io/prestosql/spi/block/RowBlockBuilder.java/RowBlockBuilder/createFieldBlockBuilders
class RowBlockBuilder:    private static BlockBuilder[] createFieldBlockBuilders(List<Type> fieldTypes, BlockBuilderStatus blockBuilderStatus, int expectedEntries)
    {
        // Stream API should not be used since constructor can be called in performance sensitive sections
        BlockBuilder[] fieldBlockBuilders = new BlockBuilder[fieldTypes.size()];
        for (int i = 0; i < fieldTypes.size(); i++) {
            fieldBlockBuilders[i] = fieldTypes.get(i).createBlockBuilder(blockBuilderStatus, expectedEntries);
        }
        return fieldBlockBuilders;
    }