vendor/twig/twig/lib/Twig/Node/Expression/Binary/Concat.php

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<?php

use Twig\Node\Expression\Binary\ConcatBinary;

class_exists('Twig\Node\Expression\Binary\ConcatBinary');

@trigger_error(sprintf('Using the "Twig_Node_Expression_Binary_Concat" class is deprecated since Twig version 2.7, use "Twig\Node\Expression\Binary\ConcatBinary" instead.'), E_USER_DEPRECATED);

if (\false) {
    /** @deprecated since Twig 2.7, use "Twig\Node\Expression\Binary\ConcatBinary" instead */
    class Twig_Node_Expression_Binary_Concat extends ConcatBinary
    {
    }
}