Javadoc
Wrap a collection of threads (Runnables) to be logged by Redwood.
Each thread will be logged as a continuous chunk; concurrent threads will be queued
and logged after the "main" thread has finished.
This means that every Runnable passed to this method will run as a chunk, though in possibly
random order.
The handlers set up will operate on the output as if it were not concurrent -- timing will be preserved
but repeated records will be collapsed as per the order the logs are actually output, rather than based
on timestamp.