How to use the fastify-decorators.Hook function in fastify-decorators

@Controller({
    route: '/request',
    type: ControllerType.REQUEST
})
class RequestController extends AbstractController {
    private callsCount = 0;

    @GET('/index')
    async indexHandler() {
        this.instance.log.info('Handled request to /request/index');

        this.callsCount++;
        return 'Request controller: index handler, calls count: ' + this.callsCount;
    }

    @Hook('onSend')
    async hidePoweredBy(request: FastifyRequest, reply: FastifyReply) {
        reply.header('X-Powered-By', 'nodejs');
    }
}

export = RequestController;

import { FastifyReply, FastifyRequest } from 'fastify';
import { IncomingMessage, ServerResponse } from 'http';
import { Controller, GET, Hook } from 'fastify-decorators';

@Controller('/ctrl')
export default class SingletonController {
    private callsCount = 0;

    @GET('/index')
    async index() {
        this.callsCount++;

        return 'Singleton controller: index handler, calls count: ' + this.callsCount;
    }

    @Hook('onSend')
    async hidePoweredBy(request: FastifyRequest, reply: FastifyReply) {
        reply.header('X-Powered-By', 'nodejs');
    }
}

schema: {
                response: {
                    200: {
                        properties: {
                            message: {type: 'string'}
                        }
                    }
                }
            }
        }
    })
    async test(request: FastifyRequest, reply: FastifyReply) {
        return {message: this.message};
    }

    @Hook('onSend')
    async hidePoweredBy(request: FastifyRequest, reply: FastifyReply) {
        reply.header('X-Powered-By', 'nodejs');
    }

    private message: string = 'Controller works!';
}