src/main/java/com/arpnetworking/logback/LoggingEventWrapper.java
public String getFormattedMessage() {
        if (_formattedMessage != null) {
            return _formattedMessage;
        }
        if (_argumentArray != null) {
            _formattedMessage = MessageFormatter.arrayFormat(_message, _argumentArray).getMessage();
        } else {
            _formattedMessage = _message;
        }

        return _formattedMessage;
    }
public String getFormattedMessage() {
        if (_formattedMessage != null) {
            return _formattedMessage;
        }
        if (_argumentArray != null) {
            _formattedMessage = MessageFormatter.arrayFormat(_message, _argumentArray).getMessage();
        } else {
            _formattedMessage = _message;
        }

        return _formattedMessage;
    }
Return the the message formatted with arguments. Implemented as suggested in:

http://jira.qos.ch/browse/LBCLASSIC-47

@return The formatted message.