return new MethodStatistics(m_transactions + operand.m_transactions, m_totalTime + operand.m_totalTime, m_errors + operand.m_errors);
m_transactions += operand.m_transactions; m_totalTime += operand.m_totalTime; m_errors += operand.m_errors;
    public synchronized MethodStatistics add(MethodStatistics operand)    {	return new MethodStatistics(m_transactions + operand.m_transactions,				    m_totalTime + operand.m_totalTime,				    m_errors + operand.m_errors);    }