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.