PhpCsFixer\Fixer\Import\SingleLineAfterImportsFixer::fix PHP Method

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        $ending = $this->whitespacesConfig->getLineEnding();
        $tokensAnalyzer = new TokensAnalyzer($tokens);
        foreach ($tokensAnalyzer->getImportUseIndexes() as $index) {
            $indent = '';
            // if previous line ends with comment and current line starts with whitespace, use current indent
            if ($tokens[$index - 1]->isWhitespace(" \t") && $tokens[$index - 2]->isGivenKind(T_COMMENT)) {
                $indent = $tokens[$index - 1]->getContent();
            } elseif ($tokens[$index - 1]->isWhitespace()) {
                $indent = Utils::calculateTrailingWhitespaceIndent($tokens[$index - 1]);
            }
            $semicolonIndex = $tokens->getNextTokenOfKind($index, array(';', array(T_CLOSE_TAG)));
            // Handle insert index for inline T_COMMENT with whitespace after semicolon
            $insertIndex = $semicolonIndex;
            if ($tokens[$semicolonIndex]->isGivenKind(T_CLOSE_TAG)) {
                if ($tokens[$insertIndex - 1]->isWhitespace()) {
                    --$insertIndex;
                }
                $tokens->insertAt($insertIndex, new Token(';'));
            }
            if ($semicolonIndex === count($tokens) - 1) {
                $tokens->insertAt($insertIndex + 1, new Token(array(T_WHITESPACE, $ending . $ending . $indent)));
            } else {
                $newline = $ending;
                $tokens[$semicolonIndex]->isGivenKind(T_CLOSE_TAG) ? --$insertIndex : ++$insertIndex;
                if ($tokens[$insertIndex]->isWhitespace(" \t") && $tokens[$insertIndex + 1]->isComment()) {
                    ++$insertIndex;
                }
                // Increment insert index for inline T_COMMENT or T_DOC_COMMENT
                if ($tokens[$insertIndex]->isComment()) {
                    ++$insertIndex;
                }
                $afterSemicolon = $tokens->getNextMeaningfulToken($semicolonIndex);
                if (null === $afterSemicolon || !$tokens[$afterSemicolon]->isGivenKind(T_USE)) {
                    $newline .= $ending;
                }
                if ($tokens[$insertIndex]->isWhitespace()) {
                    $nextToken = $tokens[$insertIndex];
                    $nextMeaningfulAfterUseIndex = $tokens->getNextMeaningfulToken($insertIndex);
                    if (null !== $nextMeaningfulAfterUseIndex && $tokens[$nextMeaningfulAfterUseIndex]->isGivenKind(T_USE)) {
                        if (substr_count($nextToken->getContent(), "\n") < 2) {
                            $nextToken->setContent($newline . $indent . ltrim($nextToken->getContent()));
                        }
                    } else {
                        $nextToken->setContent($newline . $indent . ltrim($nextToken->getContent()));
                    }
                } else {
                    $tokens->insertAt($insertIndex, new Token(array(T_WHITESPACE, $newline . $indent)));
                }
            }
        }
    }