Would anyone know any functions built into the Forge API which control when a mob despawns in minecraft? (the function that causes night mobs to despawn during the day etc..) I have a bunch of custom mobs and am attempting to figure out how to have the mobs spawn for a specific amount of world time, where after the allotted world time has passed use some sort of if then statement to access a function which would cause the mobs to despawn from the world. Any ideas?

onUpdate()
{
timer++;
if(timer>=timeLimit){
  setDead();
timer=0;
}
}

how did you define your setDead() method

I have a Tile entity which is synced up with a timer and spawns a mob at specific times. I wish to add functionality to despawn the mob in question at a different specific time within a certain radius of the tile entity. How can I use the setDead method to do this?

its alreayd inside the entity class ... you dont have to redefine it