code: public static void log (@Nonnull final Class <?> aLoggingClass,
                            @Nonnull final IErrorLevel aErrorLevel,
                            @Nonnull final String sMsg,
                            @Nullable final Throwable t)
    {
      log (LoggerFactory.getLogger (aLoggingClass), aErrorLevel, sMsg, t);
    }
docs: Generically log something
  
  @param aLoggingClass
  Logging class to use. May not be <code>null</code>.
  @param aErrorLevel
  Error level to use. May not be <code>null</code>.
  @param sMsg
  The message to log. May not be <code>null</code>.
  @param t
  Optional exception that occurred. May be <code>null</code>.