PHP-Parser/lib/PhpParser/Node/Expr/ArrayDimFetch.php

<?php declare(strict_types=1);

namespace PhpParser\Node\Expr;

use PhpParser\Node\Expr;

class ArrayDimFetch extends Expr
{
    /** @var Expr Variable */
    public $var;
    /** @var null|Expr Array index / dim */
    public $dim;

    /**
     * Constructs an array index fetch node.
     *
     * @param Expr      $var        Variable
     * @param null|Expr $dim        Array index / dim
     * @param array     $attributes Additional attributes
     */
    public function __construct(Expr $var, Expr $dim = null, array $attributes = []) {
        parent::__construct($attributes);
        $this->var = $var;
        $this->dim = $dim;
    }

    public function getSubNodeNames() : array {
        return ['var', 'dim'];
    }
}