code: func IgnoreRange(b bool) Option {
  	return func(c *options) error {
  		c.ignoreRange = b
  		return nil
  	}
  }
docs: // IgnoreRange will set make the compressor ignore Range requests.
  // Range requests are incompatible with compressed content,
  // so if this is set to true "Range" headers will be ignored.
  // If set to false, compression is disabled for all requests with Range header.