original_string: public function col_select(stdClass $row) {
          $selectcol = '<label class="accesshide" for="selectuser_' . $row->userid . '">';
          $selectcol .= get_string('selectuser', 'assign', $this->assignment->fullname($row));
          $selectcol .= '</label>';
          $selectcol .= '<input type="checkbox"
                                id="selectuser_' . $row->userid . '"
                                name="selectedusers"
                                value="' . $row->userid . '"/>';
          $selectcol .= '<input type="hidden"
                                name="grademodified_' . $row->userid . '"
                                value="' . $row->timemarked . '"/>';
          $selectcol .= '<input type="hidden"
                                name="gradeattempt_' . $row->userid . '"
                                value="' . $row->attemptnumber . '"/>';
          return $selectcol;
      }
code: public function col_select(stdClass $row) {
          $selectcol = '<label class="accesshide" for="selectuser_' . $row->userid . '">';
          $selectcol .= get_string('selectuser', 'assign', $this->assignment->fullname($row));
          $selectcol .= '</label>';
          $selectcol .= '<input type="checkbox"
                                id="selectuser_' . $row->userid . '"
                                name="selectedusers"
                                value="' . $row->userid . '"/>';
          $selectcol .= '<input type="hidden"
                                name="grademodified_' . $row->userid . '"
                                value="' . $row->timemarked . '"/>';
          $selectcol .= '<input type="hidden"
                                name="gradeattempt_' . $row->userid . '"
                                value="' . $row->attemptnumber . '"/>';
          return $selectcol;
      }
code_tokens: public function col_select ( stdClass $ row ) { $ selectcol = '<label class="accesshide" for="selectuser_' . $ row -> userid . '">' ; $ selectcol .= get_string ( 'selectuser' , 'assign' , $ this -> assignment -> fullname ( $ row ) ) ; $ selectcol .= '</label>' ; $ selectcol .= '<input type="checkbox"
                                id="selectuser_' . $ row -> userid . '"
                                name="selectedusers"
                                value="' . $ row -> userid . '"/>' ; $ selectcol .= '<input type="hidden"
                                name="grademodified_' . $ row -> userid . '"
                                value="' . $ row -> timemarked . '"/>' ; $ selectcol .= '<input type="hidden"
                                name="gradeattempt_' . $ row -> userid . '"
                                value="' . $ row -> attemptnumber . '"/>' ; return $ selectcol ; }
docstring: Insert a checkbox for selecting the current row for batch operations.
  
  @param stdClass $row
  @return string
docstring_tokens: Insert a checkbox for selecting the current row for batch operations .