Uses of Class

Packages that use NamespacedKey
The root package of the Bukkit API, contains generalized API classes.
Classes relevant to attributes.
Classes used to manipulate the voxels in a world, including special states.
Classes relating to the specialized enhancements to item stacks, as part of the meta data.
Interfaces for non-voxel objects that can exist in a world, including all players, monsters, projectiles, etc.
Classes concerning an entity's persistent memory.
Events relating to players.
Classes involved in manipulating player inventories and item interactions.
The interfaces used when manipulating extra data can can be stored inside item stacks.
Classes that allow attaching custom data to items.
Classes relevant to loot table manipulation and generation.
Classes that allow attaching persistent data to various objects.