Method.java

    private List<MessageId> resolveMessagesIds(GetMessagesRequest getMessagesRequest, ExecutionContext executionContext) {
        if (getMessagesRequest.getIdsBackReferencesPath().isPresent()) {
            BackReferencesPath path = getMessagesRequest.getIdsBackReferencesPath().get();
            return executionContext.retreiveBackReferences(path, MessageId.class);
        }
        return getMessagesRequest.getIds();
    }