PhpCsFixer\Fixer\ControlStructure\NoUselessElseFixer::fixElse PHP Method

    private function fixElse(Tokens $tokens, $index)
    {
        $previousBlockStart = $index;
        do {
            // Check if all 'if', 'else if ' and 'elseif' blocks above this 'else' always end,
            // if so this 'else' is overcomplete.
            list($previousBlockStart, $previousBlockEnd) = $this->getPreviousBlock($tokens, $previousBlockStart);
            // short 'if' detection
            $previous = $previousBlockEnd;
            if ($tokens[$previous]->equals('}')) {
                $previous = $tokens->getPrevMeaningfulToken($previous);
            }
            if (!$tokens[$previous]->equals(';') || $tokens[$tokens->getPrevMeaningfulToken($previous)]->equals('{')) {
                return;
            }
            $candidateIndex = $tokens->getPrevTokenOfKind($previous, array(';', array(T_CLOSE_TAG), array(T_IF), array(T_BREAK), array(T_CONTINUE), array(T_EXIT), array(T_GOTO), array(T_RETURN), array(T_THROW)));
            if (null === $candidateIndex || $tokens[$candidateIndex]->equalsAny(array(';', array(T_CLOSE_TAG), array(T_IF))) || $this->isInConditional($tokens, $candidateIndex, $previousBlockStart)) {
                return;
            }
            // implicit continue, i.e. delete candidate
        } while (!$tokens[$previousBlockStart]->isGivenKind(T_IF));
        // if we made it to here the 'else' can be removed
        $this->clearElse($tokens, $index);
    }