'Update the OutgoingCallerIdInstance
:param unicode friendly_name: A human readable description of the caller ID
:returns: Updated OutgoingCallerIdInstance
:rtype: twilio.rest.api.v2010.account.outgoing_caller_id.OutgoingCallerIdInstance'

def update(self, friendly_name=values.unset):

    return self._proxy.update(friendly_name=friendly_name)
