How to use the @vendure/core.InternalServerError function in @vendure/core

pricesWithTax: {
                histogram: {
                    field: groupByProduct ? 'priceWithTaxMin' : 'priceWithTax',
                    interval: searchConfig.priceRangeBucketInterval,
                },
            },
        };
        const { body }: { body: SearchResponseBody } = await this.client.search({
            index: indexPrefix + (input.groupByProduct ? PRODUCT_INDEX_NAME : VARIANT_INDEX_NAME),
            type: input.groupByProduct ? PRODUCT_INDEX_TYPE : VARIANT_INDEX_TYPE,
            body: elasticSearchBody,
        });

        const { aggregations } = body;
        if (!aggregations) {
            throw new InternalServerError(
                'An error occurred when querying Elasticsearch for priceRange aggregations',
            );
        }
        const mapPriceBuckets = (b: { key: string; doc_count: number }) => ({
            to: Number.parseInt(b.key, 10) + searchConfig.priceRangeBucketInterval,
            count: b.doc_count,
        });

        return {
            range: {
                min: aggregations.minPrice.value || 0,
                max: aggregations.maxPrice.value || 0,
            },
            rangeWithTax: {
                min: aggregations.minPriceWithTax.value || 0,
                max: aggregations.maxPriceWithTax.value || 0,

async onVendureBootstrap(): Promise {
        const options = EmailPlugin.options;
        if (isDevModeOptions(options)) {
            this.transport = {
                type: 'file',
                raw: false,
                outputPath: options.outputPath,
            };
        } else {
            if (!options.transport) {
                throw new InternalServerError(
                    `When devMode is not set to true, the 'transport' property must be set.`,
                );
            }
            this.transport = options.transport;
        }

        this.templateLoader = new TemplateLoader(options.templatePath);
        this.emailSender = new EmailSender();
        this.generator = new HandlebarsMjmlGenerator();

        if (isDevModeOptions(options) && options.mailboxPort !== undefined) {
            this.devMailbox = new DevMailbox();
            this.devMailbox.serve(options);
            this.devMailbox.handleMockEvent((handler, event) => this.handleEvent(handler, event));
        }