PhpCsFixer\Fixer\ClassNotation\MethodSeparationFixer::fix PHP Method

    public function fix(SplFileInfo $file, Tokens $tokens)
    {
        $tokensAnalyzer = new TokensAnalyzer($tokens);
        for ($index = $tokens->getSize() - 1; $index > 0; --$index) {
            if (!$tokens[$index]->isClassy()) {
                continue;
            }
            // figure out where the classy starts
            $classStart = $tokens->getNextTokenOfKind($index, array('{'));
            // figure out where the classy ends
            $classEnd = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_CURLY_BRACE, $classStart);
            if ($tokens[$index]->isGivenKind(T_INTERFACE)) {
                $this->fixInterface($tokens, $classStart, $classEnd);
            } else {
                // classes and traits can be fixed the same way
                $this->fixClass($tokens, $tokensAnalyzer, $classStart, $classEnd);
            }
        }
    }