    # File lib/chef/cookbook/cookbook_version_loader.rb, line 112
          def merge!(other_cookbook_loader)
            other_cookbook_settings = other_cookbook_loader.cookbook_settings
            @cookbook_settings.each do |file_type, file_list|
              file_list.merge!(other_cookbook_settings[file_type])
            end
            @metadata_filenames.concat(other_cookbook_loader.metadata_filenames)
          end