code: def update(self, dialing_permissions_inheritance=values.unset):
          
          data = values.of({'DialingPermissionsInheritance': dialing_permissions_inheritance, })
  
          payload = self._version.update(
              'POST',
              self._uri,
              data=data,
          )
  
          return SettingsInstance(self._version, payload, )
docs: Update the SettingsInstance
  
          :param bool dialing_permissions_inheritance: `true` for this sub-account to inherit voice dialing permissions from the Master Project; otherwise `false`
  
          :returns: Updated SettingsInstance
          :rtype: twilio.rest.voice.v1.dialing_permissions.settings.SettingsInstance