How decode to normal view t_attrs in heap_page_item_attrs?

Hi! Please, say, how can I decode the normal view t_attrs in heap_page_item_attrs? (for example if attribute string to normal string view)

SELECT t_attrs AS decoded_text

FROM heap_page_item_attrs(get_raw_page('test_table', 0), 'test_table'::regclass, true);

Best regards, Stepan Neretin.