MDL-39846 add logging TODOs

lib/classes/event/base.php

@@ -205,6 +205,8 @@ abstract class base {
      *  1/ crud - letter [crud]
      *  2/ level - number 1...100
      *
+     * TODO: MDL-37658
+     *
      * Optionally validate $this->data['extra'].
      *
      * @return void
@@ -216,6 +218,8 @@ abstract class base {
      *
      * Override in subclass, we can not make it static and abstract at the same time.
      *
+     * TODO: MDL-37658
+     *
      * @return string|\lang_string
      */
     public static function get_name() {
@@ -230,6 +234,8 @@ abstract class base {
     /**
      * Returns localised description of what happened.
      *
+     * TODO: MDL-37658
+     *
      * @return string|\lang_string
      */
     public function get_description() {
@@ -328,6 +334,8 @@ abstract class base {
     /**
      * Return auxiliary data that was stored in logs.
      *
+     * TODO: MDL-37658
+     *
      * @return array the format is standardised by logging API
      */
     public function get_logdata() {