clearLiveImages method Null safety

void clearLiveImages()

Clears any live references to images in this cache.

An image is considered live if its ImageStreamCompleter has never hit zero listeners after adding at least one listener. The ImageStreamCompleter.addOnLastListenerRemovedCallback is used to determine when this has happened.

This is called after a hot reload to evict any stale references to image data for assets that have changed. Calling this method does not relieve memory pressure, since the live image caching only tracks image instances that are also being held by at least one other object.

Implementation

void clearLiveImages() {
  for (final _LiveImage image in _liveImages.values) {
    image.dispose();
  }
  _liveImages.clear();
}