tomaszalusky

private Map<Integer,? extends Address> getAddressIndex(Optional<SubjectData> currentSubjectData) {
	return currentSubjectData
		.map(subjectData -> subjectData
			.getAddresses()
                        .stream()
                        .filter(address -> address.getEsoId() != null)
                        .collect(toMap(Address::getEsoId, t -> t))
		)
		.orElse(emptyMap())
	;