# File lib/merb-slices/module_mixin.rb, line 314
      def clone_slice!
        app_slice_root = app_dir_for(:root)
        copied, duplicated = [], []
        manifest.each do |source, relative_path|
          mirror_file(source, app_slice_root / relative_path, copied, duplicated)
        end
        [copied, duplicated]
      end