Delete all BGP communities except

[Brooks Swinnerton]

Hello,

Is it possible to delete all BGP communities from prefixes learned from a
specific BGP session except ones that start with a given value? For example
something like:

if (bgp_path ~ 64496) then {
  bgp_large_community.delete([(!64496, *, *)]);
}

I haven't tested this syntax, but I can't imagine it would work. I'm mostly
curious if there's a concept of "except" when deleting BGP communities.