'Update the InstalledAddOnInstance
:param dict configuration: The JSON object representing the configuration
:param unicode unique_name: The string that uniquely identifies this Add-on installation
:returns: Updated InstalledAddOnInstance
:rtype: twilio.rest.preview.marketplace.installed_add_on.InstalledAddOnInstance'

def update(self, configuration=values.unset, unique_name=values.unset):

    return self._proxy.update(configuration=configuration, unique_name=unique_name)
