encodeByteStream example

return $this->getEncoder()->encodeString($this->getBody(), $this->charset);
    }

    public function bodyToIterable(): iterable
    {
        if ($this->body instanceof File) {
            $path = $this->body->getPath();
            if (false === $handle = @fopen($path, 'r', false)) {
                throw new InvalidArgumentException(sprintf('Unable to open path "%s".', $path));
            }

            yield from $this->getEncoder()->encodeByteStream($handle);
        } elseif (null !== $this->seekable) {
            if ($this->seekable) {
                rewind($this->body);
            }
            yield from $this->getEncoder()->encodeByteStream($this->body);
        } else {
            yield $this->getEncoder()->encodeString($this->body);
        }
    }

    public function getPreparedHeaders(): Headers
    {

return $this->getEncoder()->encodeString($this->getBody(), $this->charset);
    }

    public function bodyToIterable(): iterable
    {
        if ($this->body instanceof File) {
            $path = $this->body->getPath();
            if (false === $handle = @fopen($path, 'r', false)) {
                throw new InvalidArgumentException(sprintf('Unable to open path "%s".', $path));
            }

            yield from $this->getEncoder()->encodeByteStream($handle);
        } elseif (null !== $this->seekable) {
            if ($this->seekable) {
                rewind($this->body);
            }
            yield from $this->getEncoder()->encodeByteStream($this->body);
        } else {
            yield $this->getEncoder()->encodeString($this->body);
        }
    }

    public function getPreparedHeaders(): Headers
    {