Method initialize

src/thundersvm/util/log.cpp:2391–2395

// MessageBuilder

        void MessageBuilder::initialize(Logger* logger) {
            m_logger = logger;
            m_containerLogSeperator = ELPP->hasFlag(LoggingFlag::NewLineForContainer) ?
                                      ELPP_LITERAL("\n    ") : ELPP_LITERAL(", ");
        }

        MessageBuilder& MessageBuilder::operator<<(const wchar_t* msg) {
            if (msg == nullptr) {