/// <summary>
/// Initializes a new instance of the <see cref="Limiter" /> class.
/// Allows events up to <see cref="Limit" /><paramref name="limit" /> and permits bursts of
/// at most <paramref name="burst" /> tokens.
/// </summary>
/// <param name="limit">The count per second which is allowed.</param>
/// <param name="burst">The burst.</param>
/// <param name="systemClock">Accessor for the current UTC time.</param>
public Limiter(Limit limit, int burst, ISystemClock systemClock = default)
{
_limit = limit;
_burst = burst;
_clock = systemClock ?? new SystemClock();
}