diff --git a/framework/core/js/src/common/utils/ItemList.ts b/framework/core/js/src/common/utils/ItemList.ts
index 79b58a5bb..a18819d21 100644
--- a/framework/core/js/src/common/utils/ItemList.ts
+++ b/framework/core/js/src/common/utils/ItemList.ts
@@ -127,7 +127,7 @@ export default class ItemList<T> {
   /**
    * Replaces an item's content, if the provided item key exists.
    *
-   * If the provided `key` is not present, nothing will happen.
+   * If the provided `key` is not present, an error will be thrown.
    *
    * @param key The key of the item in the list
    * @param content The item's new content
@@ -154,7 +154,7 @@ export default class ItemList<T> {
   /**
    * Replaces an item's priority, if the provided item key exists.
    *
-   * If the provided `key` is not present, nothing will happen.
+   * If the provided `key` is not present, an error will be thrown.
    *
    * @param key The key of the item in the list
    * @param priority The item's new priority
@@ -181,6 +181,8 @@ export default class ItemList<T> {
 
   /**
    * Remove an item from the list.
+   *
+   * If the provided `key` is not present, nothing will happen.
    */
   remove(key: string): this {
     delete this._items[key];