def render_cell_thead
      if @ask
        cell_value = (@ask.is_a?(Symbol)) ? I18n.t(@ask, {}, :header) : @ask
      else
        cell_value = @block
      end
      if @can_sort
        sort_on = @options[:sort_as] || @ask
        @html_options.merge!(:class => "#{@html_options[:class]} #{sorting_html_class(sort_on)}".strip)
        content_tag(:th, sort_link_to(cell_value, sort_on), @html_options)
      else
        content_tag(:th, cell_value, @html_options)
      end
    end
def render_cell_thead
      if @ask
        cell_value = (@ask.is_a?(Symbol)) ? I18n.t(@ask, {}, :header) : @ask
      else
        cell_value = @block
      end
      if @can_sort
        sort_on = @options[:sort_as] || @ask
        @html_options.merge!(:class => "#{@html_options[:class]} #{sorting_html_class(sort_on)}".strip)
        content_tag(:th, sort_link_to(cell_value, sort_on), @html_options)
      else
        content_tag(:th, cell_value, @html_options)
      end
    end
Return a td with the formated value or action for headers