/**
* Create stream writer object
*
* @param StreamInterface $stream The stream to write to
*
* @throws Exception\InvalidArgumentException An exception will be thrown when the provided stream is not writable
*/
public function __construct(StreamInterface $stream)
{
if (!$stream->isWritable()) {
throw new Exception\InvalidArgumentException('Stream is not writable');
}
$this->stream = $stream;
}
