public bool IsSameOrAfter(LifeState state) => _value >= state._value;
public bool IsAfter(LifeState state) => _value > state._value;
public bool IsBefore(LifeState state) => _value < state._value;
public bool IsSameOrBefore(LifeState state) => _value <= state._value;
public bool Is(LifeState state) => _value == state._value;