if (fingerprints.isEmpty()) {
                return null;
            }
            Hasher hasher = Hashing.newHasher();
            FingerprintHashingStrategy.SORT.appendToHasher(hasher, fingerprints);
            return hasher.hash();
        } catch (Exception e) {
            hashingExceptionReporter.report(zipFileSnapshot, e);
            if (fallbackZipHasher != null) {

        Hasher hasher = Hashing.newHasher();
        identityInputs.values().forEach(value -> requireNonNull(value).appendToHasher(hasher));
        String identity = hasher.hash().toString();
        return () -> identity;
    }

    @Override
    @OverridingMethodsMustInvokeSuper