How to use the botframework-schema.ActionTypes.OpenUrl function in botframework-schema

public static async buildEscalateCard(turnContext: TurnContext, data: any): Promise {

        const response: Activity = ActivityExtensions.createReply(turnContext.activity);
        const text: string = i18next.t('escalate.phoneInfo');
        response.attachments = [CardFactory.heroCard(
            text,
            undefined,
            [
                {
                    title: i18next.t('escalate.btnText1'),
                    type: ActionTypes.OpenUrl,
                    value: i18next.t('escalate.btnValue1')
                },
                {
                    title: i18next.t('escalate.btnText2'),
                    type: ActionTypes.OpenUrl,
                    value: i18next.t('escalate.btnValue2')
                }
            ]
        )];

        return Promise.resolve(response);
    }
}

public static async buildEscalateCard(turnContext: TurnContext, data: any): Promise {

        const response: Activity = ActivityExtensions.createReply(turnContext.activity);
        const text: string = i18next.t('escalate.phoneInfo');
        response.attachments = [CardFactory.heroCard(
            text,
            undefined,
            [
                {
                    title: i18next.t('escalate.btnText1'),
                    type: ActionTypes.OpenUrl,
                    value: i18next.t('escalate.btnValue1')
                },
                {
                    title: i18next.t('escalate.btnText2'),
                    type: ActionTypes.OpenUrl,
                    value: i18next.t('escalate.btnValue2')
                }
            ]
        )];

        return Promise.resolve(response);
    }
}

response.suggestedActions = {
            actions: [
            {
                title: i18next.t('main.helpBtnText1'),
                type: ActionTypes.ImBack,
                value: i18next.t('main.helpBtnValue1')
            },
            {
                title: i18next.t('main.helpBtnText2'),
                type: ActionTypes.ImBack,
                value: i18next.t('main.helpBtnValue2')
            },
            {
                title: i18next.t('main.helpBtnText3'),
                type: ActionTypes.OpenUrl,
                value: i18next.t('main.helpBtnValue3')
            }
            ],
            to: []
        };

        return Promise.resolve(response);
    }

response.suggestedActions = {
            actions: [
                {
                    title: i18next.t('main.helpBtnText1'),
                    type: ActionTypes.ImBack,
                    value: i18next.t('main.helpBtnValue1')
                },
                {
                    title: i18next.t('main.helpBtnText2'),
                    type: ActionTypes.ImBack,
                    value: i18next.t('main.helpBtnValue2')
                },
                {
                    title: i18next.t('main.helpBtnText3'),
                    type: ActionTypes.OpenUrl,
                    value: i18next.t('main.helpBtnValue3')
                }
            ],
            to: []
        };

        return Promise.resolve(response);
    }