def configBgpNumberOfAs(self, routerId, numberOfAs):
        """
        Description
            Set the total number of BGP AS # List.
            In the GUI, under NetworkGroup, BGP Route Range tab, bottom tab ASPathSegments, enter number of AS # Segments.

            NOTE! 
                Currently, this API will get the first Network Group object even if there are multiple
                Network Groups. Network Groups could be filtered by the name or by the first route range 
                address.  Haven't decided yet. Don't want to filter by name because in a situation 
                where customers are also using Spirent, Spirent doesn't go by name.

        Parameters
            routerId: The Device Group router ID
            numberOfAs: The total number of AS list to create.

        Requirements
            getDeviceGroupByRouterId()
        """
        deviceGroupObj = self.getDeviceGroupByRouterId(routerId=routerId)
        if deviceGroupObj == 0:
            raise IxNetRestApiException('No Device Group found for router ID: %s' % routerId)

        queryData = {'from': deviceGroupObj,
                    'nodes': [{'node': 'networkGroup',    'properties': [], 'where': []},
                              {'node': 'ipv4PrefixPools', 'properties': [], 'where': []},
                              {'node': 'bgpIPRouteProperty', 'properties': [], 'where': []},
                              {'node': 'bgpAsPathSegmentList', 'properties': [], 'where': []}
                          ]}
        queryResponse = self.ixnObj.query(data=queryData)
        try:
            bgpStack = queryResponse.json()['result'][0]['networkGroup'][0]['ipv4PrefixPools'][0]['bgpIPRouteProperty'][0]['bgpAsPathSegmentList']
        except:
            raise IxNetRestApiException('No object found in DeviceGroup object:  deviceGroup/networkGroup/ipv4PrefixPools/bgpIPRouteProperty/bgpAsPathSegmentList: %s' % deviceGroupObj)

        if bgpStack == []:
            return IxNetRestApiException('No ipv4PrefixPools bgpIPRouteProperty object found.')

        bgpRouteObj = bgpStack[0]['href']
        response = self.ixnObj.get(self.ixnObj.httpHeader+bgpRouteObj)
        asNumberInSegmentMultivalue = response.json()['numberOfAsNumberInSegment']
        self.ixnObj.patch(self.ixnObj.httpHeader+bgpRouteObj, data={'numberOfAsNumberInSegment': numberOfAs})