scheduled static method

VoidCallback scheduled(VoidCallback callback)

Implementation

static VoidCallback scheduled(VoidCallback callback) {
  var targetVersion = 0;
  var currentVersion = 0;
  return () {
    if (targetVersion == currentVersion) {
      targetVersion++;
      scheduleMicrotask(() {
        targetVersion = ++currentVersion;
        callback();
      });
    }
  };
}