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    <h3>Editing: StreamDecoratorTrait.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

declare(strict_types=1);

namespace GuzzleHttp\Psr7;

use Psr\Http\Message\StreamInterface;

/**
 * Stream decorator trait
 *
 * @property StreamInterface $stream
 */
trait StreamDecoratorTrait
{
    /**
     * @param StreamInterface $stream Stream to decorate
     */
    public function __construct(StreamInterface $stream)
    {
        $this-&gt;stream = $stream;
    }

    /**
     * Magic method used to create a new stream if streams are not added in
     * the constructor of a decorator (e.g., LazyOpenStream).
     *
     * @return StreamInterface
     */
    public function __get(string $name)
    {
        if ($name === 'stream') {
            $this-&gt;stream = $this-&gt;createStream();

            return $this-&gt;stream;
        }

        throw new \UnexpectedValueException(&quot;$name not found on class&quot;);
    }

    public function __toString(): string
    {
        try {
            if ($this-&gt;isSeekable()) {
                $this-&gt;seek(0);
            }

            return $this-&gt;getContents();
        } catch (\Throwable $e) {
            if (\PHP_VERSION_ID &gt;= 70400) {
                throw $e;
            }
            trigger_error(sprintf('%s::__toString exception: %s', self::class, (string) $e), E_USER_ERROR);

            return '';
        }
    }

    public function getContents(): string
    {
        return Utils::copyToString($this);
    }

    /**
     * Allow decorators to implement custom methods
     *
     * @return mixed
     */
    public function __call(string $method, array $args)
    {
        /** @var callable $callable */
        $callable = [$this-&gt;stream, $method];
        $result = ($callable)(...$args);

        // Always return the wrapped object if the result is a return $this
        return $result === $this-&gt;stream ? $this : $result;
    }

    public function close(): void
    {
        $this-&gt;stream-&gt;close();
    }

    /**
     * @return mixed
     */
    public function getMetadata($key = null)
    {
        return $this-&gt;stream-&gt;getMetadata($key);
    }

    public function detach()
    {
        return $this-&gt;stream-&gt;detach();
    }

    public function getSize(): ?int
    {
        return $this-&gt;stream-&gt;getSize();
    }

    public function eof(): bool
    {
        return $this-&gt;stream-&gt;eof();
    }

    public function tell(): int
    {
        return $this-&gt;stream-&gt;tell();
    }

    public function isReadable(): bool
    {
        return $this-&gt;stream-&gt;isReadable();
    }

    public function isWritable(): bool
    {
        return $this-&gt;stream-&gt;isWritable();
    }

    public function isSeekable(): bool
    {
        return $this-&gt;stream-&gt;isSeekable();
    }

    public function rewind(): void
    {
        $this-&gt;seek(0);
    }

    public function seek($offset, $whence = SEEK_SET): void
    {
        $this-&gt;stream-&gt;seek($offset, $whence);
    }

    public function read($length): string
    {
        return $this-&gt;stream-&gt;read($length);
    }

    public function write($string): int
    {
        return $this-&gt;stream-&gt;write($string);
    }

    /**
     * Implement in subclasses to dynamically create streams when requested.
     *
     * @throws \BadMethodCallException
     */
    protected function createStream(): StreamInterface
    {
        throw new \BadMethodCallException('Not implemented');
    }
}
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