What is the benefit of using ctx.meta.$location & ctx.meta.$responseType vs just setting via ctx.meta.$responseHeaders? about moleculer-web HOT 4 OPEN

// Redirect
			if (res.statusCode==201 || (res.statusCode >= 300 && res.statusCode < 400 && res.statusCode !== 304)) {
				const location = ctx.meta.$location;
				/* istanbul ignore next */
				if (!location) {
					this.logger.warn(`The 'ctx.meta.$location' is missing for status code '${res.statusCode}'!`);
				} else {
					res.setHeader("Location", location);
				}
			}