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3 liveuser 1 
<?php
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namespace GuzzleHttp\Psr7;
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use Psr\Http\Message\StreamInterface;
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/**
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 * Stream decorator that prevents a stream from being seeked
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 */
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class NoSeekStream implements StreamInterface
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{
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    use StreamDecoratorTrait;
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    public function seek($offset, $whence = SEEK_SET)
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    {
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        throw new \RuntimeException('Cannot seek a NoSeekStream');
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    }
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    public function isSeekable()
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    {
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        return false;
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    }
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}