laravel5/vendor/nikic/php-parser/lib/PhpParser/Node/Expr/AssignOp/Plus.php

<?php declare(strict_types=1);

namespace PhpParser\Node\Expr\AssignOp;

use PhpParser\Node\Expr\AssignOp;

class Plus extends AssignOp
{
    public function getType() : string {
        return 'Expr_AssignOp_Plus';
    }
}