code: static public Log getInstance(String name) {
          Log log = (logs.get(name));
          if (null == log) {
              log = makeNewLogInstance(name);
              Log log2 = logs.putIfAbsent(name, log);
              if (log2 != null) {
                  return log2;
              }
          }
          return log;
      }
docs: Get a <code>Log</code> instance by class name