api/src/main/java/jakarta/faces/component/behavior/_AjaxBehaviorDeltaStateHelper.java [257:376]:
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        return returnValue;
    }

    @Override
    public Object remove(Serializable key)
    {
        Object returnValue = null;
        if (_createDeltas())
        {
            if (_deltas.containsKey(key))
            {
                // Keep track of the removed values using key/null pair on the delta map
                returnValue = _deltas.put(key, null);
                _fullState.remove(key);
            }
            else
            {
                // Keep track of the removed values using key/null pair on the delta map
                _deltas.put(key, null);
                returnValue = _fullState.remove(key);
            }
        }
        else
        {
            returnValue = _fullState.remove(key);
        }
        return returnValue;
    }

    @Override
    public Object remove(Serializable key, Object valueOrKey)
    {
        // Comment by lu4242 : The spec javadoc says if it is a Collection
        // or Map deal with it. But the intention of this method is work
        // with add(?,?) and put(?,?,?), this ones return instances of
        // InternalMap and InternalList to prevent mixing, so to be
        // consistent we'll cast to those classes here.

        Object collectionOrMap = _fullState.get(key);
        Object returnValue = null;
        if (collectionOrMap instanceof InternalMap)
        {
            if (_createDeltas())
            {
                returnValue = _removeValueOrKeyFromMap(_deltas, key, valueOrKey, true);
                _removeValueOrKeyFromMap(_fullState, key, valueOrKey, false);
            }
            else
            {
                returnValue = _removeValueOrKeyFromMap(_fullState, key, valueOrKey, false);
            }
        }
        else if (collectionOrMap instanceof InternalList)
        {
            if (_createDeltas())
            {
                returnValue = _removeValueOrKeyFromCollectionDelta(_deltas, key, valueOrKey);
                _removeValueOrKeyFromCollection(_fullState, key, valueOrKey);
            }
            else
            {
                returnValue = _removeValueOrKeyFromCollection(_fullState, key, valueOrKey);
            }
        }
        return returnValue;
    }

    private static Object _removeValueOrKeyFromCollectionDelta(
            Map<Serializable, Object> stateMap, Serializable key, Object valueOrKey)
    {
        Object returnValue = null;
        Map<Object, Boolean> c = (Map<Object, Boolean>) stateMap.get(key);
        if (c != null)
        {
            if (c.containsKey(valueOrKey))
            {
                returnValue = valueOrKey;
            }
            c.put(valueOrKey, Boolean.FALSE);
        }
        return returnValue;
    }

    private static Object _removeValueOrKeyFromCollection(
            Map<Serializable, Object> stateMap, Serializable key, Object valueOrKey)
    {
        Object returnValue = null;
        Collection c = (Collection) stateMap.get(key);
        if (c != null)
        {
            if (c.remove(valueOrKey))
            {
                returnValue = valueOrKey;
            }
            if (c.isEmpty())
            {
                stateMap.remove(key);
            }
        }
        return returnValue;
    }

    private static Object _removeValueOrKeyFromMap(
            Map<Serializable, Object> stateMap, Serializable key, Object valueOrKey, boolean delta)
    {
        if (valueOrKey == null)
        {
            return null;
        }

        Object returnValue = null;
        Map<String, Object> map = (Map<String, Object>) stateMap.get(key);
        if (map != null)
        {
            if (delta)
            {
                // Keep track of the removed values using key/null pair on the delta map
                returnValue = map.put((String) valueOrKey, null);
            }
            else
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api/src/main/java/jakarta/faces/component/behavior/_DeltaStateHelper.java [364:483]:
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        return returnValue;
    }

    @Override
    public Object remove(Serializable key)
    {
        Object returnValue = null;
        if (_createDeltas())
        {
            if (_deltas.containsKey(key))
            {
                // Keep track of the removed values using key/null pair on the delta map
                returnValue = _deltas.put(key, null);
                _fullState.remove(key);
            }
            else
            {
                // Keep track of the removed values using key/null pair on the delta map
                _deltas.put(key, null);
                returnValue = _fullState.remove(key);
            }
        }
        else
        {
            returnValue = _fullState.remove(key);
        }
        return returnValue;
    }

    @Override
    public Object remove(Serializable key, Object valueOrKey)
    {
        // Comment by lu4242 : The spec javadoc says if it is a Collection 
        // or Map deal with it. But the intention of this method is work 
        // with add(?,?) and put(?,?,?), this ones return instances of 
        // InternalMap and InternalList to prevent mixing, so to be 
        // consistent we'll cast to those classes here.
        
        Object collectionOrMap = _fullState.get(key);
        Object returnValue = null;
        if (collectionOrMap instanceof InternalMap)
        {
            if (_createDeltas())
            {
                returnValue = _removeValueOrKeyFromMap(_deltas, key, valueOrKey, true);
                _removeValueOrKeyFromMap(_fullState, key, valueOrKey, false);
            }
            else
            {
                returnValue = _removeValueOrKeyFromMap(_fullState, key, valueOrKey, false);
            }
        }
        else if (collectionOrMap instanceof InternalList)
        {
            if (_createDeltas())
            {
                returnValue = _removeValueOrKeyFromCollectionDelta(_deltas, key, valueOrKey);
                _removeValueOrKeyFromCollection(_fullState, key, valueOrKey);
            }
            else
            {
                returnValue = _removeValueOrKeyFromCollection(_fullState, key, valueOrKey);
            }
        }
        return returnValue;
    }

    private static Object _removeValueOrKeyFromCollectionDelta(
            Map<Serializable, Object> stateMap, Serializable key, Object valueOrKey)
    {
        Object returnValue = null;
        Map<Object, Boolean> c = (Map<Object, Boolean>) stateMap.get(key);
        if (c != null)
        {
            if (c.containsKey(valueOrKey))
            {
                returnValue = valueOrKey;
            }
            c.put(valueOrKey, Boolean.FALSE);
        }
        return returnValue;
    }

    private static Object _removeValueOrKeyFromCollection(
            Map<Serializable, Object> stateMap, Serializable key, Object valueOrKey)
    {
        Object returnValue = null;
        Collection c = (Collection) stateMap.get(key);
        if (c != null)
        {
            if (c.remove(valueOrKey))
            {
                returnValue = valueOrKey;
            }
            if (c.isEmpty())
            {
                stateMap.remove(key);
            }
        }
        return returnValue;
    }

    private static Object _removeValueOrKeyFromMap(
            Map<Serializable, Object> stateMap, Serializable key, Object valueOrKey, boolean delta)
    {
        if (valueOrKey == null)
        {
            return null;
        }

        Object returnValue = null;
        Map<String, Object> map = (Map<String, Object>) stateMap.get(key);
        if (map != null)
        {
            if (delta)
            {
                // Keep track of the removed values using key/null pair on the delta map
                returnValue = map.put((String) valueOrKey, null);
            }
            else
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