ArgumentProcessor.php

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<?php
namespace Magento\Framework\Amqp\Topology;

trait ArgumentProcessor
{
    public function processArguments($arguments)
    {
        $output = [];
        foreach ($arguments as $key => $value) {
            if (is_array($value)) {
                $output[$key] = ['A', $value];
            } elseif (is_int($value)) {
                $output[$key] = ['I', $value];
            } elseif (is_bool($value)) {
                $output[$key] = ['t', $value];
            } elseif (is_string($value)) {
                $output[$key] = ['S', $value];
            } else {
                throw new \InvalidArgumentException('Unknown argument type ' . gettype($value));
            }
        }
        return $output;
    }
}