in src/main/java/com/epam/digital/data/platform/report/pipeline/impl/RolesPipeline.java [80:89]
private void deleteRemovedGroups(List<Group> existingGroups, List<Role> roles) {
var roleNames = roles.stream()
.map(Role::getName)
.collect(toList());
existingGroups.stream()
.filter(group -> !defaultGroups.contains(group.getName()))
.filter(group -> !roleNames.contains(group.getName()))
.forEach(roleService::delete);
}