presto-parser/src/main/java/io/prestosql/sql/parser/AstBuilder.java/AstBuilder/visitRowType
class AstBuilder:    @Override
    public Node visitRowType(SqlBaseParser.RowTypeContext context)
    {
        List<RowDataType.Field> fields = context.rowField().stream()
                .map(this::visit)
                .map(RowDataType.Field.class::cast)
                .collect(toImmutableList());

        return new RowDataType(getLocation(context), fields);
    }