public static AppLockImpl getInstance(Context context, Class<? extends AppLockActivity> activityClass) {
        synchronized (LockManager.class) {
            if (mInstance == null) {
                mInstance = new AppLockImpl<>(context, activityClass);
            }
        }
        return mInstance;
    }
Static method that allows to get back the current static Instance of {@link AppLockImpl}

@param context       The current context of the {@link Activity}
@param activityClass The activity extending {@link AppLockActivity}
@return The instance.
lib/src/main/java/com/github/omadahealth/lollipin/lib/managers/AppLockImpl.java