StringUtils.php

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<?php
namespace Magento\Framework\Data\Argument\Interpreter;

use Magento\Framework\Data\Argument\InterpreterInterface;
use Magento\Framework\Stdlib\BooleanUtils;

class StringUtils implements InterpreterInterface
{
    private $baseStringUtils;

    private $booleanUtils;

    public function __construct(
        BooleanUtils $booleanUtils,
        BaseStringUtils $baseStringUtils
    ) {
        $this->booleanUtils = $booleanUtils;
        $this->baseStringUtils = $baseStringUtils;
    }

    public function evaluate(array $data)
    {
        $result = $this->baseStringUtils->evaluate($data);
        $needTranslation = isset($data['translate'])
            ? $this->booleanUtils->toBoolean($data['translate'])
            : false;
        if ($needTranslation) {
            $result = (string)new \Magento\Framework\Phrase($result);
        }

        return $result;
    }
}