pub fn apply(raw: Option<&str>, warn_sink: &mut dyn Write)Expand description
Apply raw (the snapshotted LINESMITH_LOG value, None if
unset) to the process-wide level. On an unrecognized value the
logger resets to [DEFAULT_LEVEL] and writes one line to
warn_sink; the driver threads the injected CLI stderr through so
tests and embedders don’t see ambient stderr pollution.