class Holidays::Definition::Repository::Cache

def find(start_date, end_date, options)
  return nil unless in_cache_range?(start_date, end_date, options)
  if start_date == end_date
    @cache[options].fetch(start_date, [])
  else
    @cache[options].select do |date, holidays|
      date >= start_date && date <= end_date
    end.flat_map { |date, holidays| holidays }
  end
end