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- Map<String,Long> parz= pazienti.entrySet().stream().map(e->e.getValue()).filter(Paziente::hasDoc).collect(groupingBy(p->((Paziente)p).getDoc().getSpecializzazione(),TreeMap::new,counting()));
- return parz.entrySet().stream().sorted(comparing(e->e.getValue(),reverseOrder())).map(e->{return String.format("%3d", e.getValue()) + " - " + e.getKey();}).collect(toList());
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