<itemvalue="The FFT data representing n2+1 frequency components, where n is the capture size, with a frequency range from 0 to [samplingRate]. The first two elements contain the real parts of the 0th and (n2)th frequency component. The remaining elements contain the alternating real and imaginary parts of the frequency components up to the (n2-1)th one."/>
<itemvalue="Configuration information passed to the [ImageProvider.resolve] method to select a specific image. See also: [createLocalImageConfiguration], which creates an [ImageConfiguration] based on ambient configuration in a [Widget] environment. [ImageProvider], which uses [ImageConfiguration] objects to determine which image to obtain."/>
<itemvalue="A router that routes all pointer events received from the engine."/>
<itemvalue="Retrieve the entries of the process environment. The result is an [Iterable] of strings, where each string represents an environment entry. Environment entries should be strings containing a non-empty name and a value separated by a '=' character. The name does not contain a '=' character, so the name is everything up to the first '=' character. Values are everything after the first '=' character. A value may contain further '=' characters, and it may be empty. Returns an [OSError] if retrieving the environment fails."/>
<itemvalue="Creates a new repeating timer. The [callback] is invoked repeatedly with [duration] intervals until canceled with the [cancel] function. The exact timing depends on the underlying timer implementation. No more than `n` callbacks will be made in `duration n` time, but the time between two consecutive callbacks can be shorter and longer than `duration`. In particular, an implementation may schedule the next callback, e.g., a `duration` after either when the previous callback ended, when the previous callback started, or when the previous callback was scheduled for - even if the actual callback was delayed."/>
<itemvalue="Creates a new timer. The [callback] function is invoked after the given [duration]. Example: ```dart final timer = Timer(const Duration(seconds: 5), () => print('Timer finished')); Outputs after 5 seconds: "Timer finished". ```"/>
<itemvalue="A countdown timer that can be configured to fire once or repeatedly. The timer counts down from the specified duration to 0. When the timer reaches 0, the timer invokes the specified callback function. Use a periodic timer to repeatedly count down the same interval. A negative duration is treated the same as a duration of 0. If the duration is statically known to be 0, consider using [run]. Frequently the duration is either a constant or computed as in the following example (taking advantage of the multiplication operator of the [Duration] class): ```dart void main() { scheduleTimeout(5 1000); 5 seconds. } Timer scheduleTimeout([int milliseconds = 10000]) => Timer(Duration(milliseconds: milliseconds), handleTimeout); void handleTimeout() { callback function Do some work. } ``` Note: If Dart code using [Timer] is compiled to JavaScript, the finest granularity available in the browser is 4 milliseconds. See also: [Stopwatch] for measuring elapsed time."/>