Eloquent\Phony\Reflection\FeatureDetector::checkToken PHP Method

    public function checkToken($keyword, $constantName)
    {
        if (!defined($constantName)) {
            return false;
        }
        $tokens = token_get_all('<?php ' . $keyword);
        return is_array($tokens[1]) && constant($constantName) === $tokens[1][0];
    }