DataSift\Storyplayer\Injectables\DefaultSystemUnderTestName::initDefaultSystemUnderTestName PHP Method

    public function initDefaultSystemUnderTestName($injectables)
    {
        // special case - if there's only one defined, use that
        if (count($injectables->knownSystemsUnderTestFilenames) == 1) {
            reset($injectables->knownSystemsUnderTestFilenames);
            $this->defaultSystemUnderTestName = current($injectables->knownSystemsUnderTestFilenames);
            return;
        }
        // special case - is there one in the storyplayer.json[.dist]
        // config that we've already loaded?
        // do we have any defaults in the storyplayer.json file?
        $config = $injectables->storyplayerConfig;
        if (isset($config->defaults, $config->defaults->{'system-under-test'})) {
            $this->defaultSystemUnderTestName = $config->defaults->{'system-under-test'};
            return;
        }
        // if we get here, then we do not know what the default should be
        $this->defaultSystemUnderTestName = null;
    }