How to use the @webiny/commodo.number function in @webiny/commodo

title: onSet(value => (instance.locked ? instance.title : value))(
                string({ validation: validation.create("required") })
            ),
            snippet: onSet(value => (instance.locked ? instance.snippet : value))(string()),
            url: onSet(value => (instance.locked ? instance.url : value))(
                string({ validation: validation.create("required") })
            ),
            content: onSet(value => (instance.locked ? instance.content : value))(
                content({ context })
            ),
            settings: onSet(value => (instance.locked ? instance.settings : value))(
                fields({
                    instanceOf: PbPageSettings
                })
            ),
            version: number(),
            parent: context.commodo.fields.id(),
            published: flow(
                onSet(value => {
                    // Deactivate previously published revision
                    if (value && value !== instance.published && instance.isExisting()) {
                        instance.locked = true;
                        instance.publishedOn = new Date();
                        instance.registerHookCallback("beforeSave", async () => {
                            // TODO: setOnce
                            // Deactivate previously published revision
                            const publishedRev: PbPage = (await PbPage.findOne({
                                query: { published: true, parent: instance.parent }
                            }): any);

                            if (publishedRev) {
                                publishedRev.published = false;

fields: onSet(value => (instance.locked ? instance.fields : value))(
                fields({
                    list: true,
                    value: [],
                    instanceOf: FormFieldsModel
                })
            ),
            layout: onSet(value => (instance.locked ? instance.layout : value))(
                object({ value: [] })
            ),
            stats: skipOnPopulate()(fields({ instanceOf: FormStatsModel, value: {} })),
            settings: onSet(value => (instance.locked ? instance.settings : value))(
                fields({ instanceOf: FormSettingsModel, value: {} })
            ),
            triggers: onSet(value => (instance.locked ? instance.triggers : value))(object()),
            version: number(),
            parent: string(),
            publishedOn: date(),
            published: onSet(value => {
                if (value) {
                    instance.publishedOn = new Date();
                    if (!instance.locked) {
                        instance.locked = true;
                    }
                }

                return value;
            })(boolean()),
            locked: skipOnPopulate()(boolean({ value: false }))
        })),
        withHooks({

export default ({ createBase, context }) => {
    const File = flow(
        withName("File"),
        withProps({
            get src() {
                const settings = context.files.getSettings();
                return settings.data.srcPrefix + this.key;
            }
        }),
        withFields({
            key: setOnce()(string({ validation: validation.create("required,maxLength:200") })),
            size: number(),
            type: string({ validation: validation.create("maxLength:50") }),
            name: string({ validation: validation.create("maxLength:100") }),
            meta: object(),
            tags: onSet(value => {
                if (!Array.isArray(value)) {
                    return null;
                }

                return value.map(item => item.toLowerCase());
            })(
                string({
                    list: true,
                    validation: tags => {
                        if (!Array.isArray(tags)) {
                            return;
                        }