code: public static Logger getLogger(final String suffix) {
          notNull("suffix", suffix);
          if (suffix.startsWith(".") || suffix.endsWith(".")) {
              throw new IllegalArgumentException("The suffix can not start or end with a '.'");
          }
  
          String name = PREFIX + "." + suffix;
  
          if (USE_SLF4J) {
              return new SLF4JLogger(name);
          } else {
              return new JULLogger(name);
          }
      }
docs: Gets a logger with the given suffix appended on to {@code PREFIX}, separated by a '.'.
  
  @param suffix the suffix for the logger
  @return the logger
  @see Loggers#PREFIX