Uses of Interface
org.bukkit.inventory.Merchant

Packages that use Merchant 
Package Description
org.bukkit
The root package of the Bukkit API, contains generalized API classes.
org.bukkit.entity
Interfaces for non-voxel objects that can exist in a world, including all players, monsters, projectiles, etc.
org.bukkit.event.inventory
Events relating to inventory manipulation.
org.bukkit.inventory
Classes involved in manipulating player inventories and item interactions.