[FEATURE REQUEST]chat grouping

I'm asking for the possibility of chat grouping. For example, priv/business/family/friends chat groups. Personal Messenger doesn't have these options, and since the messages are loaded dynamically through scrolling down, I'm not sure if the messenger api allows manual querying of a chat (so they can be easily viewed in the groups assigned by the user). Chat grouping would be a godsend in Messenger...