# File lib/chef/cookbook/synchronizer.rb, line 187
    def cached_copy_up_to_date?(local_path, expected_checksum)
      if cache.has_key?(local_path)
        current_checksum = CookbookVersion.checksum_cookbook_file(cache.load(local_path, false))
        expected_checksum == current_checksum
      else
        false
      end
    end