pub fn installed() -> Option<Arc<dyn OutputChannel>>Expand description
The installed channel, if any. SRD-88 — task-local-first: a
concurrent in-process execution that scoped its own channel
(ExecutionContext.channel) resolves to it; everything else (single-run,
bootstrap, tests) falls back to the process-global CHANNEL (axiom A1, a
true no-op until a context scopes one).