_onAdded(event) {
        debug('_onAdded', this.toString());

        // CASE: you are type "pages", but the incoming type is "users"
        if (event.type !== this.resourceType) {
            return;
        }

        const resource = this.resources.getByIdAndType(event.type, event.id);
        this._try(resource);
    }
@description Listener which get's called when a resource was added on runtime.
@param {Object} event
@param {String} event.type
@param {String} event.id
@private