disposeObserver method

Implementation

void disposeObserver(VoidCallback observer) {
  /// Stores the =.
  final observables = _observerDependencies.remove(observer);

  /// if method.
  if (observables != null) {
    /// for method.
    for (final obs in observables) {
      obs.removeListener(observer);
    }
  }
  _pendingObservers.remove(observer);
}