[Bug] Animations in CEM variants don't work if base model doesn't exist

[magmamir]

Description of Issue

CEM variants (e.g., iron_golem2.jem) don't get animations if the base model (e.g., iron_golem.jem) does not exist. If the base model exists, animations in the variant models work properly. Animations in the base model always function. The base model doesn't need to have animations itself to enable animations in the variant models. This issue doesn't exist in ETF+EMF mods.

Steps to Reproduce

1. Download of_bug_test.zip resourcepack and activate it.
2. Create a custom mob with /summon minecraft:iron_golem ~ ~ ~ {NoAI:1b,HandItems:[{},{id:"minecraft:jigsaw",count:1,components:{"minecraft:custom_data":{mmdp:{deformation:{mob:{blastling:{model:2b}}}}}}}]} command
3. Observe that it has no custom animation (hands are not moving)
   
4. Download of_bug_test_below.zip resourcepack (which is basically just a vanilla iron_golem.jem placed in optifine/cem folder) and activate it by placing below the of_bug_test.zip. Alternatively you can place any iron_golem.jem file to optifine/cem folder of the of_bug_test.zip.
5. Observe that the mob now have animations (hands are moving)
   

Affected Versions

• OptiFine HD U J1 1.21.1
• OptiFine HD U J2 1.21.3
• OptiFine HD U J3 pre9 1.21.4

Maybe others

Installation Method

• Standalone versions

[ZenithRogue]

Honestly never even tried doing this, figuring nothing would happen. My recommendation is to place an iron_golem.jem file in the CEM folder containing only the following

{}

[magmamir]

I checked now, and it seems that {} doesn't work. The behavior of iron_golem.jem containing only brackets is identical to not having the iron_golem.jem at all.