in src/main/java/com/googlesource/gerrit/plugins/websession/flatfile/FlatFileWebSessionCache.java [88:95]
public ConcurrentMap<String, Val> asMap() {
return sessionStream()
.map(path -> new SimpleImmutableEntry<>(path.getFileName().toString(), readFile(path)))
.filter(entry -> entry.getValue() != null)
.collect(
Collectors.toConcurrentMap(
SimpleImmutableEntry::getKey, SimpleImmutableEntry::getValue));
}