I am writing a python script using PyEZ to access the table that results from the command "show ethernet-switching evpn arp-table". I've identified the RPC as "get-ethernet-switching-evpn-arp-table", and I am attempting to define a custom view for this table, but I can only find the item name "l2ng-l2rtb-evpn-arp-db"; there does not appear to be any fields defined under it. Can I not access this table with PyEZ?