How to use the testcafe-hammerhead.RequestFilterRule function in testcafe-hammerhead

await this._loadFromPath(this.init);
        else {
            const { path: initPath, content: initContent, module: initModule, page: initPage } = this.init as ClientScript;

            if (initPath && initContent || initPath && initModule || initContent && initModule)
                throw new GeneralError(RUNTIME_ERRORS.clientScriptInitializerMultipleContentSources);

            if (initPath)
                await this._loadFromPath(initPath);
            else if (initModule)
                await this._loadFromModule(initModule);
            else
                this.content = initContent;

            if (initPage)
                this.page = new RequestFilterRule(initPage);
        }

        this._calculateHash();
        this._prepareUrl();
    }

respond (body, statusCode, headers) {
        if (!this.pendingRequestFilterRuleInit)
            throw new APIError('respond', RUNTIME_ERRORS.requestHookConfigureAPIError, RequestMock.name, "The 'onRequestTo' method was not called before 'respond'. You must call the 'onRequestTo' method to provide the URL requests to which are mocked.");

        const mock = new ResponseMock(body, statusCode, headers);
        const rule = new RequestFilterRule(this.pendingRequestFilterRuleInit);

        this.requestFilterRules.push(rule);
        this.mocks.set(rule, mock);
        this.pendingRequestFilterRuleInit = null;

        return this;
    }
}

this.requestFilterRules.forEach(rule => {
            const instantiatedRule = rule instanceof RequestFilterRule ? rule : new RequestFilterRule(rule);

            this._instantiatedRequestFilterRules.push(instantiatedRule);
        });
    }