'Initialize the AssignedAddOnInstance
:returns: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.AssignedAddOnInstance
:rtype: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.AssignedAddOnInstance'

def __init__(self, version, payload, account_sid, resource_sid, sid=None):

    super(AssignedAddOnInstance, self).__init__(version)
    self._properties = {'sid': payload['sid'], 'account_sid': payload['account_sid'], 'resource_sid': payload['resource_sid'], 'friendly_name': payload['friendly_name'], 'description': payload['description'], 'configuration': payload['configuration'], 'unique_name': payload['unique_name'], 'date_created': deserialize.rfc2822_datetime(payload['date_created']), 'date_updated': deserialize.rfc2822_datetime(payload['date_updated']), 'uri': payload['uri'], 'subresource_uris': payload['subresource_uris']}
    self._context = None
    self._solution = {'account_sid': account_sid, 'resource_sid': resource_sid, 'sid': (sid or self._properties['sid'])}
