PhpCsFixer\Tokenizer\TokensAnalyzer::isArrayMultiLine PHP Method

    public function isArrayMultiLine($index)
    {
        if (!$this->isArray($index)) {
            throw new \InvalidArgumentException(sprintf('Not an array at given index %d.', $index));
        }
        $tokens = $this->tokens;
        // Skip only when its an array, for short arrays we need the brace for correct
        // level counting
        if ($tokens[$index]->isGivenKind(T_ARRAY)) {
            $index = $tokens->getNextMeaningfulToken($index);
        }
        $endIndex = $tokens[$index]->equals('(') ? $tokens->findBlockEnd(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $index) : $tokens->findBlockEnd(Tokens::BLOCK_TYPE_ARRAY_SQUARE_BRACE, $index);
        for (++$index; $index < $endIndex; ++$index) {
            $token = $tokens[$index];
            $blockType = Tokens::detectBlockType($token);
            if ($blockType && $blockType['isStart']) {
                $index = $tokens->findBlockEnd($blockType['type'], $index);
                continue;
            }
            if ($token->isWhitespace() && !$tokens[$index - 1]->isGivenKind(T_END_HEREDOC) && false !== strpos($token->getContent(), "\n")) {
                return true;
            }
        }
        return false;
    }

 private function fixArray(Tokens $tokens, $index)
 {
     $tokensAnalyzer = new TokensAnalyzer($tokens);
     if ($tokensAnalyzer->isArrayMultiLine($index)) {
         return;
     }
     $startIndex = $index;
     if ($tokens[$startIndex]->isGivenKind(T_ARRAY)) {
         $startIndex = $tokens->getNextTokenOfKind($startIndex, array('('));
         $endIndex = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $startIndex);
     } else {
         $endIndex = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_ARRAY_SQUARE_BRACE, $startIndex);
     }
     $beforeEndIndex = $tokens->getPrevMeaningfulToken($endIndex);
     $beforeEndToken = $tokens[$beforeEndIndex];
     if ($beforeEndToken->equals(',')) {
         $tokens->removeTrailingWhitespace($beforeEndIndex);
         $beforeEndToken->clear();
     }
 }