Function never_respond_policy 

pub fn never_respond_policy(
    _ctx: &IdentityRequestContext<'_>,
) -> RespondDecision

A respond policy that answers nothing.

Lets a node keep a live profile while declining to be discovered. The profile is what unsolicited advertisements are built from, so silencing the responder this way — rather than by uninstalling it — is what keeps the two behaviours independent.