FieldTranslator.php

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<?php
declare(strict_types=1);

namespace Magento\Framework\GraphQl\Query;

class FieldTranslator
{
    private $translationMap = [];

    public function __construct(array $translationMap)
    {
        $this->translationMap = $translationMap;
    }

    public function translate(string $fieldName) : string
    {
        if (isset($this->translationMap[$fieldName])) {
            return $this->translationMap[$fieldName];
        }

        return $fieldName;
    }
}