atomic(handler) {
        // Cork the provided handler if the response is not finished yet
        if (!this.completed) this._raw_response.cork(handler);

        // Make this chainable
        return this;
    }
Alias of `uWS.HttpResponse.cork()` which allows for manual corking of the response.
This is required by `uWebsockets.js` to maximize network performance with batched writes.

@param {Function} handler
@returns {Response} Response (Chainable)