original_string: public function col_operation($data) {
          $tokenpageurl = new \moodle_url(
              "/admin/webservice/tokens.php",
              [
                  "sesskey" => sesskey(),
                  "action" => "delete",
                  "tokenid" => $data->id
              ]
          );
          return \html_writer::link($tokenpageurl, get_string("delete"));
      }
code: public function col_operation($data) {
          $tokenpageurl = new \moodle_url(
              "/admin/webservice/tokens.php",
              [
                  "sesskey" => sesskey(),
                  "action" => "delete",
                  "tokenid" => $data->id
              ]
          );
          return \html_writer::link($tokenpageurl, get_string("delete"));
      }
code_tokens: public function col_operation ( $ data ) { $ tokenpageurl = new \ moodle_url ( "/admin/webservice/tokens.php" , [ "sesskey" => sesskey ( ) , "action" => "delete" , "tokenid" => $ data -> id ] ) ; return \ html_writer :: link ( $ tokenpageurl , get_string ( "delete" ) ) ; }
docstring: Generate the operation column.
  
  @param \stdClass $data Data for the current row
  @return string Content for the column
docstring_tokens: Generate the operation column .