NoSeekStream.php

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<?php
namespace GuzzleHttp\Psr7;

use Psr\Http\Message\StreamInterface;

class NoSeekStream implements StreamInterface
{
    use StreamDecoratorTrait;

    public function seek($offset, $whence = SEEK_SET)
    {
        throw new \RuntimeException('Cannot seek a NoSeekStream');
    }

    public function isSeekable()
    {
        return false;
    }
}