package androidx.lifecycle {

  public abstract class LiveData<T> {
    ctor public LiveData();
    method public T getValue();
    method public boolean hasActiveObservers();
    method public boolean hasObservers();
    method public void observe(androidx.lifecycle.LifecycleOwner, androidx.lifecycle.Observer<? super T>);
    method public void observeForever(androidx.lifecycle.Observer<? super T>);
    method protected void onActive();
    method protected void onInactive();
    method protected void postValue(T);
    method public void removeObserver(androidx.lifecycle.Observer<? super T>);
    method public void removeObservers(androidx.lifecycle.LifecycleOwner);
    method protected void setValue(T);
  }

  public class MutableLiveData<T> extends androidx.lifecycle.LiveData {
    ctor public MutableLiveData();
    method public void postValue(T);
    method public void setValue(T);
  }

  public abstract interface Observer<T> {
    method public abstract void onChanged(T);
  }

}