Cannot resolve method 'setBlock(BlockPos, RegistryObject<LiquidBlock>)'

I am trying to spawn fluid, but Intellij says " Cannot resolve method 'setBlock(BlockPos, RegistryObject<LiquidBlock>)' "
 

package net.svisvi.jigsawpp.effect;

import net.minecraft.core.BlockPos;
import net.minecraft.world.effect.MobEffect;
import net.minecraft.world.effect.MobEffectCategory;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.level.Level;

import static net.svisvi.jigsawpp.init.JigsawPpModBlocks.PONOS_WATER_BLOCK;

public class purgenEffect extends MobEffect {
    public purgenEffect(MobEffectCategory mobEffectCategory, int color) {
        super(mobEffectCategory, color);
    }
    public void applyEffectTick(LivingEntity pLivingEntity, Level worldin, BlockPos pos) {
        if (pLivingEntity.level().isClientSide()) {
            worldin.setBlock(pos, PONOS_WATER_BLOCK);
        }

    }

}

Edited January 29, 20241 yr by scoden