private function getFixersConflicts(FixerInterface $fixer)
    {
        static $conflictMap = [
            'no_blank_lines_before_namespace' => ['single_blank_line_before_namespace'],
        ];

        $fixerName = $fixer->getName();

        return \array_key_exists($fixerName, $conflictMap) ? $conflictMap[$fixerName] : [];
    }
private function getFixersConflicts(FixerInterface $fixer)
    {
        static $conflictMap = [
            'no_blank_lines_before_namespace' => ['single_blank_line_before_namespace'],
        ];

        $fixerName = $fixer->getName();

        return \array_key_exists($fixerName, $conflictMap) ? $conflictMap[$fixerName] : [];
    }
@param FixerInterface $fixer

@return null|string[]