original_string: public function col_select($expiredctx) {
          $id = $expiredctx->get('id');
          return html_writer::checkbox('expiredcontext_' . $id, $id, $this->selectall, '', ['class' => 'selectcontext']);
      }
code: public function col_select($expiredctx) {
          $id = $expiredctx->get('id');
          return html_writer::checkbox('expiredcontext_' . $id, $id, $this->selectall, '', ['class' => 'selectcontext']);
      }
code_tokens: public function col_select ( $ expiredctx ) { $ id = $ expiredctx -> get ( 'id' ) ; return html_writer :: checkbox ( 'expiredcontext_' . $ id , $ id , $ this -> selectall , '' , [ 'class' => 'selectcontext' ] ) ; }
docstring: Generate the select column.
  
  @param stdClass $expiredctx The row data.
  @return string
docstring_tokens: Generate the select column .