PhpCsFixer\Fixer\NamespaceNotation\SingleBlankLineBeforeNamespaceFixer::fix PHP Method

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        for ($index = $tokens->count() - 1; $index >= 0; --$index) {
            $token = $tokens[$index];
            if ($token->isGivenKind(T_NAMESPACE)) {
                $this->fixLinesBeforeNamespace($tokens, $index, 2);
            }
        }
    }