public function initActiveSystemUnderTestConfigSupport($sutName, $injectables)
{
// does the system-under-test exist?
if (!$injectables->knownSystemsUnderTestList->hasEntry($sutName)) {
throw new E4xx_NoSuchSystemUnderTest($sutName);
}
// remember the system-under-test
$this->activeSystemUnderTestName = $sutName;
$this->activeSystemUnderTestConfig = $injectables->knownSystemsUnderTestList->getEntry($sutName);
// we need to merge the 'roles' section into our chosen test environment
$injectables->activeTestEnvironmentConfig->mergeSystemUnderTestConfig($this->activeSystemUnderTestConfig);
}