MixinPlayer.java

package org.spongepowered.mixin.impl;

import net.minecraft.entity.player.EntityPlayerMP;
import org.spongepowered.api.entity.Player;
import org.spongepowered.mod.mixin.Mixin;
import org.spongepowered.mod.mixin.Shadow;

@Mixin(EntityPlayerMP.class)
public abstract class MixinPlayer implements Player {

    @Shadow(prefix = "shadow$") abstract float shadow$getHealth();

    @Override
    public double getHealth() {
        return shadow$getHealth();
    }
}