def serverGreeting(self, caps):
        """
        Called when the server has sent us a greeting.

        @type caps: C{dict}
        @param caps: Capabilities the server advertised in its greeting.
        """

        Called when the server has sent us a greeting.

        @type caps: C{dict}
        @param caps: Capabilities the server advertised in its greeting.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/imap4.py