src/game/java/com/mojang/realmsclient/package-info.java

@ParametersAreNonnullByDefault
@MethodsReturnNonnullByDefault
@FieldsAreNonnullByDefault
@OnlyIn(Dist.CLIENT)
package com.mojang.realmsclient;

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