Finds the first HasLogLevel for the given Throwable including
its chain of causes and returns its logLevel.
Finds the first HasLogLevel for the given Throwable including
its chain of causes and returns its logLevel.
None if neither t nor any of its causes are a
HasLogLevel. Otherwise, returns Some of the first
one found.
this finds the first HasLogLevel, and should be there be multiple in the chain of causes, it will not use the most severe.