Finds values at, or near, the specified times in a given series. The operation generates keys starting from the smallest key of the original series, using the specified `interval` and then finds values close to such keys using the specified `lookup` and `dir`. ## Parameters - `series` - An input series to be resampled - `interval` - The interval between the individual samples - `dir` - Specifies how the keys should be generated. `Direction.Forward` means that the key is the smallest value of each chunk (and so first key of the series is returned and the last is not, unless it matches exactly _start + k*interval_); `Direction.Backward` means that the first key is skipped and sample is generated at, or just before the end of interval and at the end of the series. - `lookup` - Specifies how the lookup based on keys is performed. `Exact` means that the values at exact keys will be returned; `NearestGreater` returns the nearest greater key value (starting at the first key) and `NearestSmaller` returns the nearest smaller key value (starting at most `interval` after the end of the series) ## Remarks This operation is only supported on ordered series. The method throws `InvalidOperationException` when the series is not ordered. [category:Sampling, resampling and advanced lookup]

public static Series<K, V> lookupTime<K, V>(
	TimeSpan interval,
	Direction dir,
	Lookup lookup,
	Series<K, V> series
)