_body_parser_stop() {
        // Return if we have no expected body length or already flushing the body
        if (this._body_expected_bytes === -1 || this._body_parser_flushing) return;

        // Mark the body parser as flushing to prevent any more incoming body data from being accepted
        this._body_parser_flushing = true;

        // Determine if we have a readable stream
        if (this._readable) {
            // Push an empty chunk to indicate the end of the stream
            this.push(null);

            // Resume the readable stream to ensure in case it was paused to flush the buffered chunks
            this.resume();
        }
    }
Stops the body parser from accepting any more incoming body data.
@private