in src/main/java/com/googlesource/gerrit/plugins/saml/SamlMembership.java [172:177]
private Optional<AccountGroup.NameKey> samlGroupToName(String samlGroup) {
return Optional.of(samlGroup)
.filter(s -> !s.isEmpty())
.map(GROUP_PREFIX::concat)
.map(AccountGroup::nameKey);
}