'Fetch a DocumentPermissionInstance
:returns: Fetched DocumentPermissionInstance
:rtype: twilio.rest.preview.sync.service.document.document_permission.DocumentPermissionInstance'

def fetch(self):

    params = values.of({})
    payload = self._version.fetch('GET', self._uri, params=params)
    return DocumentPermissionInstance(self._version, payload, service_sid=self._solution['service_sid'], document_sid=self._solution['document_sid'], identity=self._solution['identity'])
