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   1  <?php
   2  
   3  namespace Psr\Http\Client;
   4  
   5  use Psr\Http\Message\RequestInterface;
   6  use Psr\Http\Message\ResponseInterface;
   7  
   8  interface ClientInterface
   9  {
  10      /**
  11       * Sends a PSR-7 request and returns a PSR-7 response.
  12       *
  13       * @param RequestInterface $request
  14       *
  15       * @return ResponseInterface
  16       *
  17       * @throws \Psr\Http\Client\ClientExceptionInterface If an error happens while processing the request.
  18       */
  19      public function sendRequest(RequestInterface $request): ResponseInterface;
  20  }