pub fn holds(wires: &dyn WireSource, binding: &str) -> Option<bool>Expand description
Evaluate the named predicate against the executing node’s kernel.
None when the binding does not resolve — which is a wiring fault, not a
false predicate, and callers must not conflate the two. Treating an
unresolved condition as “false” would make a poll spin until its timeout
and a while exit immediately, both silently.