How to show only value map on a Map Label object

[s.gasca]

I have an item prototype with the Ifname value of my switch interface


So i have for the interface 1 of my switch the value GigabitEthernet1/0/3 and i created a value map who transform GigabitEthernet to G to have G1/0/3 in result. It works but when i want to use this in map label using {{HOST.HOST}:net.if.type[ifName.2].last()} i have this on the map :



I would like to have only the value map i have done without the (GigabitEthernet) like this :


So how i can show only the value map on the label ? to have something like this in the end



Thanks.

[s.gasca]

I found how to do it. i use the the Preprocessing on item prototype :