presto-iceberg/src/main/java/io/prestosql/plugin/iceberg/util/PageListBuilder.java/PageListBuilder/appendVarcharArray
class PageListBuilder:    public void appendVarcharArray(Iterable<String> values)
    {
        BlockBuilder column = nextColumn();
        BlockBuilder array = column.beginBlockEntry();
        for (String value : values) {
            VARCHAR.writeString(array, value);
        }
        column.closeEntry();
    }