FluidTYPO3\Vhs\ViewHelpers\Math\AbstractSingleMathViewHelper::getInlineArgument PHP Method

    protected function getInlineArgument()
    {
        $a = $this->renderChildren();
        if (null === $a && true === isset($this->arguments['a'])) {
            $a = $this->arguments['a'];
        }
        if (null === $a && true === (bool) $this->arguments['fail']) {
            throw new Exception('Required argument "a" was not supplied', 1237823699);
        }
        return $a;
    }