requiresChecksums.set(true);
            }
            return f;
        };
    }

    @Override
    int getOrder() {
        return -1;
    }

    public Set<String> getTrustedKeys() {
        return trustedKeys;
    }

    public PgpEntry addVerifiedKey(String key) {
        trustedKeys.add(key);
        return this;
    }

    public Factory<File> getSignatureFile() {