Abstract class with abstract packet-related functions. It's implemented as another class by every version of Minecraft.
Unconnected player for visualization. In the world is registered as an entity and it will not be found in the array of player obtained with world.online!Player nor in the count obtained with world.count!Player.
Checks whether or not the given symbol is of a connected player class.
Checks if the given entity is an instance of a connected player.