def __init__(self, jsondict=None):
        
        self.endpoint = None
        """ Where the channel points to.
        Type `str`. """
        
        self.header = None
        """ Usage depends on the channel type.
        Type `str`. """
        
        self.payload = None
        """ Mimetype to send, or blank for no payload.
        Type `str`. """
        
        self.type = None
        """ rest-hook | websocket | email | sms | message.
        Type `str`. """
        
        super(SubscriptionChannel, self).__init__(jsondict)
Sends a HEAD request. Returns :class:`Response` object.
dataset/ETHPy150Open smart-on-fhir/client-py/fhirclient/models/subscription.py/SubscriptionChannel.__init__--crossover with--dataset/ETHPy150Open Bolton-and-Menk-GIS/restapi/restapi/requests/api.py/head