PhpCsFixer\Fixer\ReturnNotation\SimplifiedNullReturnFixer::fix PHP Method

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        foreach ($tokens as $index => $token) {
            if (!$token->isGivenKind(T_RETURN)) {
                continue;
            }
            if ($this->needFixing($tokens, $index)) {
                $this->clear($tokens, $index);
            }
        }
    }