's a forge core plugin
[11:00:28] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.fml.common.asm.transformers.AccessTransformer to enqueued access transformers
[11:00:28] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin
[11:00:28] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin
[11:00:28] [main/INFO] [FML/]: Ignoring missing certificate for coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin), we are in deobf and it''net.minecraftforge.gradle.GradleForgeHacks$AccessTransformerTransformer'