# File lib/action_view/base.rb, line 378
    def full_template_path(template_path, extension)
      if @@cache_template_extensions
        (@@cached_base_paths[template_path] ||= {})[extension.to_s] ||= find_full_template_path(template_path, extension)
      else
        find_full_template_path(template_path, extension)
      end
    end