In-app billing Items available for purchase

MainActivity.java

List<String> skuList = new ArrayList<>();
        skuList.add("product_1");
        skuList.add("product_2");
        SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
        params.setSkusList(skuList).setType(BillingClient.SkuType.INAPP);
        mBillingClient.querySkuDetailsAsync(params.build(),
                new SkuDetailsResponseListener() {
                    @Override
                    public void onSkuDetailsResponse(int responseCode, List<SkuDetails> skuDetailsList) {
                        if (responseCode == BillingClient.BillingResponse.OK
                                && skuDetailsList != null) {
                            for (SkuDetails skuDetails : skuDetailsList) {
                                String sku = skuDetails.getSku();
                                String price = skuDetails.getPrice();
                                if ("product_1".equals(sku)) {
                                    Toast.makeText(MainActivity.this, "Product 1", Toast.LENGTH_SHORT).show();
                                } else if ("product_2".equals(sku)) {
                                    Toast.makeText(MainActivity.this, "Product 2", Toast.LENGTH_SHORT).show();
                                }
                            }
                        }

                    }
                });

whats the purpose ofstartSubscribe()here ?

@shadygoneinsane that came by mistake