PhpCsFixer\Fixer\CastNotation\LowercaseCastFixer::fix PHP Method

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        for ($index = 0, $count = $tokens->count(); $index < $count; ++$index) {
            if (!$tokens[$index]->isCast()) {
                continue;
            }
            $tokens[$index]->setContent(strtolower($tokens[$index]->getContent()));
        }
    }