public final void clearSkills() {
        final Map<Skill, SkillEntry> skills = new HashMap<>(getPlayer().getSkills());
        final Map<Skill, SkillEntry> newList = new HashMap<>();
        for (Entry<Skill, SkillEntry> skill : skills.entrySet()) {
            newList.put(skill.getKey(), new SkillEntry((byte) 0, (byte) 0, -1));
        }
        getPlayer().changeSkillsLevel(newList);
        newList.clear();
        skills.clear();
    }