Proxy.php

<?php
namespace GuzzleHttp\Handler;
 
use GuzzleHttp\RequestOptions;
use Psr\Http\Message\RequestInterface;
 
class Proxy
{
    public static function wrapSync(
        callable $default,
        callable $sync
    ) {
        return function (RequestInterface $request, array $options) use ($default, $sync) {
            return empty($options[RequestOptions::SYNCHRONOUS])
                ? $default($request, $options)
                : $sync($request, $options);
        };
    }
 
    public static function wrapStreaming(
        callable $default,
        callable $streaming
    ) {
        return function (RequestInterface $request, array $options) use ($default, $streaming) {
            return empty($options['stream'])
                ? $default($request, $options)
                : $streaming($request, $options);
        };
    }
}