def getAuthorizedKeys(avatarId):
        """
        Gets an iterable of authorized keys that are valid for the given
        C{avatarId}.

        @param avatarId: the ID of the avatar
        @type avatarId: valid return value of
            L{twisted.cred.checkers.ICredentialsChecker.requestAvatarId}

        @return: an iterable of L{twisted.conch.ssh.keys.Key}
        """

        Gets an iterable of authorized keys that are valid for the given
        C{avatarId}.

        @param avatarId: the ID of the avatar
        @type avatarId: valid return value of
            L{twisted.cred.checkers.ICredentialsChecker.requestAvatarId}

        @return: an iterable of L{twisted.conch.ssh.keys.Key}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/checkers.py