API and documentation show different data


https://developers.hubspot.com/docs/methods/email/email_events_overview - here I am getting many constants I expect to see in your API. But when I do http://api.hubapi.com/email/public/v1/subscriptions/timeline?hapikey=demo I see “change”: “UNSUBSCRIBED”, Also I get f.e. PORTAL_STATUS for changeType field. Where can I get a true list of values API returns me? So, full list of change, changeType and source fields? Thank you.