Returns only messages with unread mentions of the current user, or messages that are replies to their messages. When
using this filter the results can't be additionally filtered by a query, a message thread or by the sending user.
Subtype of SearchMessagesFilter.
Returns only messages with unread mentions of the current user, or messages that are replies to their messages. When using this filter the results can't be additionally filtered by a query, a message thread or by the sending user. Subtype of SearchMessagesFilter.