return null;
return new NullLogger(name);
    public static Logger getLogger(String name,boolean def) {        if (!checked){            try {                Class verify = Class.forName("org.apache.log4j.Logger");                log4j = true;            }            catch (ClassNotFoundException cnfe){                log4j = false;            }            if (log4j){				    String sLog4j = System.getProperty("FBLog4j");                if (!def){                    if (sLog4j != null && sLog4j.equals("true"))                        log4j = true;						  else                        log4j = false;					 }                else{                    if (sLog4j != null && sLog4j.equals("false"))                        log4j = false;						  else                        log4j = true;					 }            }            checked = true;        }        if (log4j)            return new Log4jLogger(name);        else            return null;    }