module ActiveModel::Serializer::Caching::ClassMethods

def fragmented_attributes
  cached = _cache_only ? _cache_only : _attributes - _cache_except
  cached = cached.map! { |field| _attributes_keys.fetch(field, field) }
  non_cached = _attributes - cached
  non_cached = non_cached.map! { |field| _attributes_keys.fetch(field, field) }
  {
    cached: cached,
    non_cached: non_cached
  }
end