EntityJoinWorldEvent is fired when an Entity joins the world. 
 This event is fired whenever an Entity is added to the world in 
 
World#loadEntities(Collection), 
net.minecraft.world.ServerWorld#loadEntities(Collection) World#joinEntityInSurroundings(Entity), and 
World#spawnEntity(Entity). 
 
 
world contains the world in which the entity is to join.
 
 This event is 
Cancelable.
 If this event is canceled, the Entity is not added to the world.
 
 This event does not have a result. 
HasResult
 
 This event is fired on the 
MinecraftForge.EVENT_BUS.