Time

mod time: sig {
    /// When v updates wait timeout and then return it. If v updates again
    /// before timeout expires, reset the timeout and continue waiting.
    val after_idle: fn([duration, Number], 'a) -> 'a;

    /// timer will wait timeout and then update with the current time.
    /// If repeat is true, it will do this forever. If repeat is a number n,
    /// it will do this n times and then stop. If repeat is false, it will do
    /// this once.
    val timer: fn([duration, Number], [bool, Number]) -> Result<datetime, `TimerError(string)>;

    /// return the current time each time trigger updates
    val now: fn(Any) -> datetime;
}