Deprecate invalid getReactions method (#6039)

* Deprecate invalid getReactions method.

* Update CHANGELOG.md.

* Update DEPRECATIONS.md.

* Remove tests.

* Change deprecation level from error to warning.

Author: VelikovPetar

CHANGELOG.md

@@ -24,6 +24,7 @@
 ### ⚠️ Changed
 - Deprecate `ChatClient.markThreadUnread(String, String, String, String)` because marking a thread as unread from a given message is currently not supported. [#6027](https://github.com/GetStream/stream-chat-android/pull/6027)
 - Deprecate `ChannelClient.markThreadUnread(String, String)` because marking a thread as unread from a given message is currently not supported. [#6027](https://github.com/GetStream/stream-chat-android/pull/6027)
+- Deprecate `ChannelClient.getReactions(messageId: String, firstReactionId: String, limit: Int)` because it is no longer supported. [#6039](https://github.com/GetStream/stream-chat-android/pull/6039)
 
 ### ❌ Removed
 

DEPRECATIONS.md

@@ -4,6 +4,7 @@ This document lists deprecated constructs in the SDK, with their expected time 
 
 | API / Feature                                                                                                                                                                              | Deprecated (warning)   | Deprecated (error)    | Removed               | Notes                                                                                                                                                                                                                                                                                                                                                |
 |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------|-----------------------|-----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `ChannelClient.getReactions(messageId: String, firstReactionId: String, limit: Int)` method                                                                                                | 2025.12.10 ⌛           |                       |                       | This method has been deprecated because it is no longer supported. Use `ChannelClient.getReactions(messageId: String, offset: Int, limit: Int)` instead.                                                                                                                                                                                             |
 | `AttachmentsPickerViewModel.loadData()` method                                                                                                                                             | 2025.12.10 ⌛           |                       |                       | This method is deprecated because it is no longer used and will be removed in future versions.                                                                                                                                                                                                                                                       |
 | `ChatClient.markThreadUnread(channelType: String, channelId: String, threadId: String, mesageId: String)` method                                                                           | 2025.11.24 ⌛           |                       |                       | This method is deprecated because marking a thread as unread from a given message is currently not supported, and the passed `messageId` is ignored. Use `ChatClient.markThreadUnread(channelType: String, channelId: String, threadId: String)` instead.                                                                                            |
 | `ChannelClient.markThreadUnread(threadId: String, mesageId: String)` method                                                                                                                | 2025.11.24 ⌛           |                       |                       | This method is deprecated because marking a thread as unread from a given message is currently not supported, and the passed `messageId` is ignored. Use `ChannelClient.markThreadUnread(threadId: String)` instead.                                                                                                                                 |

stream-chat-android-client/src/main/java/io/getstream/chat/android/client/channel/ChannelClient.kt

@@ -673,6 +673,10 @@ public class ChannelClient internal constructor(
         return client.getReactions(messageId, offset, limit)
     }
 
+    @Deprecated(
+        message = "This operation is not supported. " +
+            "Use ChannelClient.getReactions(messageId: String, offset: Int, limit: Int) instead.",
+    )
     @CheckResult
     public fun getReactions(
         messageId: String,

stream-chat-android-docs/src/main/java/io/getstream/chat/docs/java/client/cms/Messages.java

@@ -291,11 +291,6 @@ public void paginatingReactions() {
             offset = 10;
             channelClient.getReactions("message-id", offset, limit)
                     .enqueue(result -> { /* ... */ });
-
-            // Get 10 reactions after particular reaction
-            String reactionId = "reaction-id";
-            channelClient.getReactions("message-id", reactionId, limit)
-                    .enqueue(result -> { /* ... */ });
         }
 
         /**

stream-chat-android-docs/src/main/kotlin/io/getstream/chat/docs/kotlin/client/cms/Messages.kt

@@ -295,13 +295,6 @@ class Messages(
                 offset = 10,
                 limit = 10,
             ).enqueue { /* ... */ }
-
-            // Get 10 reactions after particular reaction
-            channelClient.getReactions(
-                messageId = "message-id",
-                firstReactionId = "reaction-id",
-                limit = 10,
-            ).enqueue { /* ... */ }
         }
 
         /**