Update comment

src/matrix/room/timeline/entries/EventEntry.js

@@ -146,7 +146,7 @@ export class EventEntry extends BaseEventEntry {
         return getRelatedEventId(this.event);
     }
 
-    // similar to relatedEventID but excludes relations like redaction
+    // similar to relatedEventID but only for replies
     get contextEventId() {
         if (this.isReply) {
             return this.relatedEventId;

src/matrix/room/timeline/entries/NonPersistedEventEntry.js

@@ -17,6 +17,8 @@ limitations under the License.
 import {EventEntry} from "./EventEntry.js";
 
 // EventEntry but without the two properties that are populated via SyncWriter
+// Useful if you want to create an EventEntry that is ephemeral
+
 export class NonPersistedEventEntry extends EventEntry {
     get fragmentId() {
         throw new Error("Cannot access fragmentId for non-persisted EventEntry");