code: public static void mapSku(String sku, String storeName, @NotNull String storeSku) {
          SkuManager.getInstance().mapSku(sku, storeName, storeSku);
      }
docs: Maps the sku and the storeSku for a particular store.
  The best practice is to use SKU like <code>com.companyname.application.item</code>.
  Such SKU fits most of stores so it doesn't need to be mapped.
  If the recommended approach is not applicable, use application internal SKU in the code (usually it is a SKU for Google Play)
  and map SKU of other stores using this method. OpenIAB will map SKU in both directions,
  so you can use only your inner SKU to purchase, consume and check.
  
  @param sku       The logical internal SKU. E.g. redhat
  @param storeSku  The store-specific SKU. Shouldn't duplicate already mapped values. E.g. appland.redhat
  @param storeName The name of a store. @see {@link IOpenAppstore#getAppstoreName()} or {@link #NAME_AMAZON}, {@link #NAME_GOOGLE}
  @throws java.lang.IllegalArgumentException If one of the arguments is null or empty.
  @deprecated Use {@link org.onepf.oms.SkuManager#mapSku(String, String, String)}