presto-orc/src/main/java/io/prestosql/orc/metadata/OrcType.java/OrcType/createOrcArrayType
class OrcType:    private static List<OrcType> createOrcArrayType(int nextFieldTypeIndex, Type itemType)
    {
        nextFieldTypeIndex++;
        List<OrcType> itemTypes = toOrcType(nextFieldTypeIndex, itemType);

        List<OrcType> orcTypes = new ArrayList<>();
        orcTypes.add(new OrcType(OrcTypeKind.LIST, ImmutableList.of(new OrcColumnId(nextFieldTypeIndex)), ImmutableList.of("item")));
        orcTypes.addAll(itemTypes);
        return orcTypes;
    }