def in_theme_dir(*paths)
      return nil unless theme

      paths.reduce(theme.root) do |base, path|
        Jekyll.sanitized_path(base, path)
      end
    end
def in_theme_dir(*paths)
      return nil unless theme

      paths.reduce(theme.root) do |base, path|
        Jekyll.sanitized_path(base, path)
      end
    end
Public: Prefix a given path with the theme directory.

 paths - (optional) path elements to a file or directory within the
         theme directory

 Returns a path which is prefixed with the theme root directory.