How to use the teraslice.makeAssetStore function in teraslice

async load() {
        const {
            context,
            assets,
            assetsDirectory
        } = this;
        const { logger } = context;

        // no need to load assets
        if (isEmpty(assets)) return;

        this.assetStore = await makeAssetStore(context);

        let idArray;

        try {
            idArray = await this.assetStore.parseAssetsArray(assets);
        } catch (err) {
            throw new WrapError(err);
        }

        await Promise.map(idArray, async (assetIdentifier) => {
            const downloaded = await fs.pathExists(path.join(assetsDirectory, assetIdentifier));
            // need to return the id to the assets array sent back
            if (downloaded) return { id: assetIdentifier };

            const assetRecord = await this.assetStore.get(assetIdentifier);
            logger.info(`loading assets: ${assetIdentifier}`);