Uses of Class
org.bukkit.inventory.EquipmentSlot

Packages that use EquipmentSlot 
Package Description
org.bukkit.attribute
Classes relevant to attributes.
org.bukkit.entity
Interfaces for non-voxel objects that can exist in a world, including all players, monsters, projectiles, etc.
org.bukkit.event.block
Events relating to when a block is changed or interacts with the world.
org.bukkit.event.entity
Events relating to entities, excluding some directly referencing some more specific entity types.
org.bukkit.event.player
Events relating to players.
org.bukkit.inventory
Classes involved in manipulating player inventories and item interactions.
org.bukkit.inventory.meta
The interfaces used when manipulating extra data can can be stored inside item stacks.