original_string: protected function show_hide_link($column, $index) {
          if ($index > 0 || !$this->hasgrade) {
              return parent::show_hide_link($column, $index);
          }
          return '';
      }
code: protected function show_hide_link($column, $index) {
          if ($index > 0 || !$this->hasgrade) {
              return parent::show_hide_link($column, $index);
          }
          return '';
      }
code_tokens: protected function show_hide_link ( $ column , $ index ) { if ( $ index > 0 || ! $ this -> hasgrade ) { return parent :: show_hide_link ( $ column , $ index ) ; } return '' ; }
docstring: Override the table show_hide_link to not show for select column.
  
  @param string $column the column name, index into various names.
  @param int $index numerical index of the column.
  @return string HTML fragment.
docstring_tokens: Override the table show_hide_link to not show for select column .