_fetchSingle(resourceConfig, id) {
        let modelOptions = _.cloneDeep(resourceConfig.modelOptions);
        modelOptions.id = id;

        return models.Base.Model.raw_knex.fetchAll(modelOptions);
    }
@description Call the model layer to fetch a single resource via raw knex queries.

This function was invented, because the model event is a generic event, which is independent of any
api version behavior. We have to ensure that a model matches the conditions of the configured api version
in the theme.

See https://github.com/TryGhost/Ghost/issues/10124.

@param {Object} resourceConfig
@param {String} id
@returns {Promise}
@private