> For the complete documentation index, see [llms.txt](https://wiki.incredibleplugins.com/upradeablehoppers/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.incredibleplugins.com/upradeablehoppers/developers/itemstacker.md).

# ItemStacker

Adding support for your own item stacking plugin is easy. Make sure you [setup the API](/upradeablehoppers/developers/api.md) then just impletemt the `ItemStackerProvider` interface and set it as seen below.

```java
ItemStackerProvider provider = new ItemStackerProvider() {
    ...
}

UpgradeableHoppersAPI.getInstance().setItemStackerProvider(provider);
```