Can you detect if a mod is loaded?

[ZombieEnderman5]

Specifically, can you detect if a mod is loaded via its ID? Ex: 

if (Loader.isLoaded("theboxingdead")) {
  
  ...
  
}

In this case, Loader means whatever class could check if mods are loaded via ID; "theboxingdead" is a String that encompasses the mod ID to query. I'm asking because I want to add compatibility between my mod Ghostly and my mod The Boxing Dead, but don't know how to check if The Boxing Dead and Ghostly are both loaded. The code would be in Ghostly's .jar file, not The Boxing Dead's. The reason for even using an if statement: I want to register certain entities only if The Boxing Dead also exists, since they're variants of its entities and as such there's no reason to register them if The Boxing Dead isn't loaded.

Edited July 24, 2018 by ZombieEnderman5

[ZombieEnderman5]

Thanks for the reply.

EDIT BELOW:
How could I do that? I don't think there's any way for me to register entities yet not have them exist in-game if a mod isn't loaded.

Edited July 24, 2018 by ZombieEnderman5

[Matryoshika]

You still have them ingame, just don't add them to creative tabs, or recipes, making the /give command the only way to get them.

[ZombieEnderman5]

I don't think that can work for entities...

[DaemonUmbra]

Disable spawning and implement logic to self-remove if they are already spawned?

[ZombieEnderman5]

Not sure I can do that, unless I check in the onLivingUpdate() method that the mod is loaded and, if not, use setDead() on the entity. I can do spawn checks. EDIT BELOW:

For spawn eggs, I can probably register the entity without registering a spawn egg if the mod isn't loaded, else register it with a spawn egg

Edited July 25, 2018 by ZombieEnderman5