presto-thrift/src/main/java/io/prestosql/plugin/thrift/ThriftTableMetadata.java/ThriftTableMetadata/columnMetadata
class ThriftTableMetadata:    private static List<ColumnMetadata> columnMetadata(List<PrestoThriftColumnMetadata> columns, TypeManager typeManager)
    {
        return columns.stream()
                .map(column -> column.toColumnMetadata(typeManager))
                .collect(toImmutableList());
    }