'Access the extensions
:returns: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.assigned_add_on_extension.AssignedAddOnExtensionList
:rtype: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.assigned_add_on_extension.AssignedAddOnExtensionList'

@property
def extensions(self):

    if (self._extensions is None):
        self._extensions = AssignedAddOnExtensionList(self._version, account_sid=self._solution['account_sid'], resource_sid=self._solution['resource_sid'], assigned_add_on_sid=self._solution['sid'])
    return self._extensions
