Chat ID or username
Optional
icon?: null | LongNew icon of the topic.
Can be a custom emoji ID, or null
to remove the icon
and use static color instead
Optional
shouldWhether to dispatch the returned service message (if any) to the client's update handler.
Optional
title?: stringNew topic title
ID of the topic (i.e. its top message ID)
Service message about the modification
Modify a topic in a forum
Only admins with
manageTopics
permission can do this.