# Utility Classes

## SlotContent

In RRV, everything concerning recipe content is handled via a class called `SlotContent`.
It is a representation of all item stacks a slot holds. The content is constantly ticked while a player is looking at a recipe to achieve an overview over the possible inputs & outputs.
To wrap your ingredients and results (items, item stacks, fluid stacks, lists of items, ...) just call `SlotContent.of();`

## Stack-Sensitives

Stack-Sensitives are variants of items that only differ in their components.
Vanilla examples include Enchanted Books, Potions, and Tipped Arrows.

If you want to add your own item stacks to the index simply call `ItemView.addStackSensitive()` in a reload callback (`ItemView.addServerReloadCallback()`).

You can also exclude items from the index by calling `ItemView.excludeItem()` This method does not need to be called in a reload callback, since it's only client-side.

## TagUtil

`TagUtil` provides helper functions for encoding and decoding different objects from and to [NBT](https://minecraft.wiki/w/NBT_format).

## ItemView

- The primary integration class for RRV, `ItemView` provides tools for adding client recipe wrappers, server recipe providers, reload callbacks, excluding items from the index, and more.