subscribeViewLifecycles method

void Function() subscribeViewLifecycles(
  1. GraphViewLifecycleListener listener
)

Observe logical framework view registration and membership changes.

Implementation

void Function() subscribeViewLifecycles(GraphViewLifecycleListener listener) {
  _viewLifecycleListeners.add(listener);
  var subscribed = true;
  return () {
    if (!subscribed) return;
    subscribed = false;
    _viewLifecycleListeners.remove(listener);
  };
}