You're seeing just the function
set_topic, go back to Slack.Web.Conversations module for more information.
Change the topic of a conversation. The calling user must be a member of the conversation. Not all conversation types may have a purpose set.
channel- Conversation to set the purpose of. ex:
topic- The new topic string. Does not support formatting or linkification. ex:
Apply topically for best effects
Errors the API can return:
channel_not_found- Value passed for
is_archived- Channel has been archived
method_not_supported_for_channel_type- This type of conversation cannot be used with this method.
not_in_channel- Authenticated user is not in the channel.
too_long- Topic was longer than 250 characters.
user_is_restricted- This method cannot be called by a restricted user or single channel guest.