FluidTYPO3\Flux\Controller\AbstractFluxController::resolveOverriddenFluxControllerActionNameFromRequestParameters PHP Method

    protected function resolveOverriddenFluxControllerActionNameFromRequestParameters($pluginSignature)
    {
        $requestParameters = (array) GeneralUtility::_GET($pluginSignature);
        $overriddenControllerActionName = TRUE === isset($requestParameters['action']) ? $requestParameters['action'] : NULL;
        return $overriddenControllerActionName;
    }