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File: ContainerRepresentation.php
<?php

declare(strict_types=1);

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 Jonathan Vollebregt (jnvsor@gmail.com), Rokas Šleinius (raveren@gmail.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

namespace Kint\Value\Representation;

use InvalidArgumentException;
use Kint\Value\AbstractValue;

class ContainerRepresentation extends AbstractRepresentation
{
    /**
     * @psalm-readonly
     *
     * @psalm-var non-empty-array<AbstractValue>
     */
    protected array $contents;

    /** @psalm-param non-empty-array<AbstractValue> $contents */
    public function __construct(string $label, array $contents, ?string $name = null, bool $implicit_label = false)
    {
        if ([] === $contents) {
            throw new InvalidArgumentException("ContainerRepresentation can't take empty list");
        }

        parent::__construct($label, $name, $implicit_label);
        $this->contents = $contents;
    }

    /** @psalm-return non-empty-array<AbstractValue> */
    public function getContents(): array
    {
        return $this->contents;
    }

    public function getLabel(): string
    {
        return parent::getLabel().' ('.\count($this->contents).')';
    }
}