src/game/java/net/minecraft/client/animation/package-info.java

@ParametersAreNonnullByDefault
@MethodsReturnNonnullByDefault
@FieldsAreNonnullByDefault
@OnlyIn(Dist.CLIENT)
package net.minecraft.client.animation;

import javax.annotation.ParametersAreNonnullByDefault;
import net.minecraft.FieldsAreNonnullByDefault;
import net.minecraft.MethodsReturnNonnullByDefault;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;