Specify a set of logger names and the corresponding log levels that
this log recorder will collect. For example, if you specify
hudson.model.Hudson and info, any logs recorded
for hudson.model.Hudson or its descendants with the log level
info or above will show up in this log recorder, unless a more specific
logger with higher log level is also specific.
If you have multiple entries, a log entry will the most specific one will be collected.
Also see
this document for more about logging in Java and Jenkins.