Idle Time and Mob Despawning in Minecraft Forge

IdleTimeAndMobDespawningInMinecraftForge.txt

idletime has these interactions:

is reset to 0 when:
	when attacked
	in the despawn check, when:
		when the despawn fails due to persistance flag set or preventDespawn returning true
		when the forge event is denied
		when the nearest player is closer than the random despawn distance
	when piglin or raider uses a ranged attack
	when raider starts targeting a home
	when vindicator starts targeting a door
	when johnny vindicator starts targeting anything
	raiders' idle time is fixed at 0 while targeting a player
	withers' idle time is fixed at 0 while game mode isn't peaceful
	
	
is incremented:
	by +1/tick for all MobEntities (not players or armor stands)
	additionally by +2/tick for most monsters while light > 0.5
	additionally by +2/tick every tick for raiders

is checked to determine:
	random despawn check (must be > 600)
	pillagers can only join raid if idle time <= 2400
	random walk goal can only run if idle time < 100
	squids can only move if idle time <= 100

other things related to despawning:
	instant despawn distance (to nearest player)
		if entity is further away from any player than this, entity will despawn
		this is 128 for most things and 64 for ambient water fish
		this can ONLY be prevented via:
			setting the persistence flag to make noDespawnRequired return true
			overriding preventDespawn
				this is only done by raiders (during raids), endermen (while holding a block), and fish (that came from bucket)
			denying forge's despawn event

	idle time + canDespawn check -- if ALL of these are true:
		idleTime > 600 (30 seconds)
		rand.nextInt(800) == 0	(about once in every 40 seconds, or about 22% every minute)
		distance to nearest player > 32
		canDespawn returns true (given distance to nearest player)

	so canDespawn controls random despawning (distance > 32), but not instant despawning (distance > 128)
	preventDespawn & persistance controls both