Uses of Interface
org.bukkit.permissions.Permissible

Packages that use Permissible 
Package Description
org.bukkit.command
Classes relating to handling specialized non-chat player input.
org.bukkit.entity
Interfaces for non-voxel objects that can exist in a world, including all players, monsters, projectiles, etc.
org.bukkit.entity.minecart
Interfaces for various Minecart types.
org.bukkit.permissions
Classes dedicated to providing binary state properties to players.
org.bukkit.plugin
Classes specifically relating to loading software modules at runtime.