public function append_nonsortable_field_name($field_name)
 {
     $th = new HTMLTags_TH();
     $f_n_l_o_ws = Formatting_ListOfWords::get_list_of_words_for_string($field_name, '_');
     $th->append_str_to_content($f_n_l_o_ws->get_words_as_capitalised_string());
     $this->append_tag_to_content($th);
 }
 public function append_nonsortable_field_name($field_name, $title = NULL)
 {
     $th = new HTMLTags_TH();
     if (!isset($title)) {
         $f_n_l_o_ws = Formatting_ListOfWordsHelper::get_list_of_words_for_string($field_name, '_');
         $title = $f_n_l_o_ws->get_words_as_capitalised_string();
     }
     $th->append_str_to_content($title);
     $this->append_tag_to_content($th);
 }