@Override public int isPurchased(@Nonnull final String product, @Nonnull final String sku, @Nonnull final RequestListener<Boolean> listener) { Check.isNotEmpty(sku); final IsPurchasedListener isPurchasedListener = new IsPurchasedListener(sku, listener); final GetPurchasesRequest request = new GetPurchasesRequest(product, null, mConfiguration.getPurchaseVerifier()); isPurchasedListener.mRequest = request; return runWhenConnected(request, wrapListener(isPurchasedListener), mTag); }