'Access the domains
:returns: twilio.rest.api.v2010.account.sip.domain.DomainList
:rtype: twilio.rest.api.v2010.account.sip.domain.DomainList'

@property
def domains(self):

    if (self._domains is None):
        self._domains = DomainList(self._version, account_sid=self._solution['account_sid'])
    return self._domains
