Config.php

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<?php
namespace Magento\Eav\Model\Entity\Attribute\Source;

class Config extends \Magento\Eav\Model\Entity\Attribute\Source\AbstractSource
{
    protected $_optionsData;

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

    public function getAllOptions()
    {
        if ($this->_options === null) {
            $this->_options = [];

            if (empty($this->_optionsData)) {
                throw new \Magento\Framework\Exception\LocalizedException(__('No options found.'));
            }
            foreach ($this->_optionsData as $option) {
                $this->_options[] = ['value' => $option['value'], 'label' => __($option['label'])];
            }
        }

        return $this->_options;
    }
}