# Currently: has $!sth-ensure-item; has $!sth-list-items; method ensure-item { $!sth-ensure-item //= $!dbh.prepare(…); $!sth-ensure-item.execute(…); } method list-items { $!sth-list-items //= $!dbh.prepare(…); $!sth-list-items.execute(…); } # Preferred: method ensure-item { something $sth := $!dbh.prepare(…); $sth.execute(…); } method list-items { something $sth := $!dbh.prepare(…); $sth.execute(…); }