private function getLineBreakCount(Tokens $tokens, $whiteStart, $whiteEnd)
    {
        $lineCount = 0;
        for ($i = $whiteStart; $i < $whiteEnd; ++$i) {
            $lineCount += Preg::matchAll('/\R/u', $tokens[$i]->getContent(), $matches);
        }

        return $lineCount;
    }
private function getLineBreakCount(Tokens $tokens, $whiteStart, $whiteEnd)
    {
        $lineCount = 0;
        for ($i = $whiteStart; $i < $whiteEnd; ++$i) {
            $lineCount += Preg::matchAll('/\R/u', $tokens[$i]->getContent(), $matches);
        }

        return $lineCount;
    }
@param Tokens $tokens
@param int    $whiteStart
@param int    $whiteEnd

@return int