src/models/Output.php
public function startPrintf($string)
    {
        if (empty($string)) {
            return '';
        }

        $this->startTime[$string] = microtime(true);

        $this->stdout('/*** Begin '. $string . " ***/" . self::ENTER, 0, Console::FG_YELLOW);

        return 0;
    }
public function startPrintf($string)
    {
        if (empty($string)) {
            return '';
        }

        $this->startTime[$string] = microtime(true);

        $this->stdout('/*** Begin '. $string . " ***/" . self::ENTER, 0, Console::FG_YELLOW);

        return 0;
    }
printf some thing at the terminal and record start time
@param string $string
@return int exit code