This feature provides new API for hiding players from each other. The implementation provides three new methods on the Player class: showPlayer, hidePlayer, and canSee. All three of these take a Player as an argument. Player.hidePlayer removes a specified player from view. This will send a packet to remove them from the user list as well as hiding them in-game. This also makes them appear offline when the user runs /list and /tell. This: Code: playerA.hidePlayer(playerB); will hide playerB from playerA both in game as well as in the user list, /list, and /tell. Player.showPlayer is the reverse, this will make the specified player visible again in all the ways hidePlayer had hidden them. Player.canSee is used for checking to see if a player can see another specified player and can be used for hiding from view in your own implementation of /list as well as other areas you'd list online players. It is expected that a Vanish plugin would listen to PlayerJoinEvent and immediately hide all currently invisible players from the newly joining player. This API does not hide chat and join/quit messages or create fake join/quit messages. A plugin that wants such features will need to implement them on their own. For an example of how a Vanish plugin would use this API look at https://github.com/amaranth/SimpleVanish
