code: public final void infoDebugf(final Throwable cause, final String message, final Object... args)
      {
          logDebugf(Level.INFO, cause, message, args);
      }
docs: Logs a formatted message and stack trace if DEBUG logging is enabled
  or a formatted message and exception description if INFO logging is enabled.
  
  @param cause   an exception to print stack trace of if DEBUG logging is enabled
  @param message a <a href="http://download.oracle.com/javase/6/docs/api/java/util/Formatter.html#syntax">format string</a>
  @param args    arguments referenced by the format specifiers in the format string.