public List<Entry> getUpdatedEntriesAndRefresh() {
        List<Entry> ret = new ArrayList<>();
        for (Entry entry : entries) {
            if (entry.isUpdated()) {
                ret.add(entry);
            }
        }
        return ret;
    }
Get the list of all updated entries i.e. all entries which have modification date
which is newer than the last time check. ATTENTION: As a side effect this method also
updates the timestamp of entries.

@return list of all entries which has been updated since the last call to this method or an empty list
src/main/java/io/fabric8/maven/docker/assembly/AssemblyFiles.java