src/com/android/launcher3/LauncherProviderChangeListener.java

package com.android.launcher3;

/**
 * This class is a listener for {@link LauncherProvider} changes. It gets notified in the
 * sendNotify method. This listener is needed because by default the Launcher suppresses
 * standard data change callbacks.
 */
public interface LauncherProviderChangeListener {

    void onLauncherProviderChanged();

    void onExtractedColorsChanged();

    void onAppWidgetHostReset();
}