public void commit() {
        if (mEditor != null) {
            mEditor.commit();
            mEditor = null;
        }
    }
Constructor.

@param sp A SharedPreferences instance provided by the system.
@param o The Obfuscator to use when reading or writing data.
android/android_framework/base/src/main/java/com/google/android/vending/licensing/PreferenceObfuscator.java