/// <summary>
/// Advances the virtual time at the zoo by <see cref="TimeIncrements"/> and decreases
/// all animals health by a random amount, the range of which can be controlled by a <paramref name="randCallBack"/>.
/// </summary>
/// <param name="randCallBack">An optional callback where callers can control the parameters of the health decrease. Defaults to a random values between 0 and 20</param>
public void AdvanceTime(Func <Random, int> randCallBack = null)
{
CheckConfigured();
TimeOfDay = TimeOfDay.AddSeconds(TimeIncrements);
DecreaseAllAnimalHealth(randCallBack);
StatusChanged?.Invoke(this, null);
}