on
Deprecated
As of 4.27.2, replaced with GroupChannelHandler.onUserMarkedRead and GroupChannelHandler.onUserMarkedUnread.
A callback for when read receipts are updated on GroupChannel.
To use the updated read receipt, refer to
GroupChannel.getReadStatus,
GroupChannel.getReadMembers,
GroupChannel.getUnreadMembers.
Parameters
channel
The GroupChannel where the read receipt is updated.