Alert grouping test with amtool

What did you do?
Now we are activly using amtool config routes test and find it extremely usefull, but recently found that we should check if alert grouping is expected too.
for example
now we are checking that

% amtool config routes test --config.file alertmanager.yaml --tree \
--verify.receivers wire-team-opsgenie 'team=wire'
Matching routes:
.
└── default-route
    └── {team=~"^(?:^(wire)$)$"}  receiver: wire-team-opsgenie
wire-team-opsgenie

it will be usefull if we can pass something like

% amtool config routes test --config.file alertmanager.yaml \
--tree --verify.receivers wire-team-opsgenie \
--verify.grouping=env,cluster,priority 'team=wire'

Matching routes:
.
└── default-route
    └── {team=~"^(?:^(wire)$)$"}  receiver: wire-team-opsgenie
wire-team-opsgenie, grouping: [env,cluster,priority]