Edit / Add / Remove caption

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/Timeline.kt

@@ -59,10 +59,17 @@ interface Timeline : AutoCloseable {
 
     suspend fun editMessage(
         eventOrTransactionId: EventOrTransactionId,
-        body: String, htmlBody: String?,
+        body: String,
+        htmlBody: String?,
         intentionalMentions: List<IntentionalMention>,
     ): Result<Unit>
 
+    suspend fun editCaption(
+        eventOrTransactionId: EventOrTransactionId,
+        caption: String?,
+        formattedCaption: String?,
+    ): Result<Unit>
+
     suspend fun replyMessage(
         eventId: EventId,
         body: String,