Install MixinExtras on Fabric or Quilt
masterFabricLoader 0.15.0+ includes MixinExtras by default. If you need to support older versions or require a specific version, use the following Gradle configuration. Note that you should use annotationProcessor for the fabric-specific artifact.
dependencies {
include(implementation(annotationProcessor("io.github.llamalad7:mixinextras-fabric:0.5.4")))
}