api/src/main/java/jakarta/faces/component/behavior/_AjaxBehaviorDeltaStateHelper.java [70:134]:
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        this._fullState = new HashMap<>();
        this._deltas = null;
    }

    /**
     * Used to create delta map on demand
     *
     * @return
     */
    private boolean _createDeltas()
    {
        if (isInitialStateMarked())
        {
            if (_deltas == null)
            {
                _deltas = new HashMap<>(2, 1f);
            }
            return true;
        }

        return false;
    }

    protected boolean isInitialStateMarked()
    {
        return _target.initialStateMarked();
    }

    @Override
    public void add(Serializable key, Object value)
    {
        if (_createDeltas())
        {
            //Track delta case
            Map<Object, Boolean> deltaListMapValues = (Map<Object, Boolean>) _deltas.get(key);
            if (deltaListMapValues == null)
            {
                deltaListMapValues = new InternalDeltaListMap<>(3, 1f);
                _deltas.put(key, deltaListMapValues);
            }

            deltaListMapValues.put(value, Boolean.TRUE);
        }

        //Handle change on full map
        List<Object> fullListValues = (List<Object>) _fullState.get(key);
        if (fullListValues == null)
        {
            fullListValues = new InternalList<>(3);
            _fullState.put(key, fullListValues);
        }

        fullListValues.add(value);
    }

    @Override
    public <T> T eval(Serializable key)
    {
        T returnValue = (T) _fullState.get(key);
        if (returnValue != null)
        {
            return returnValue;
        }
        ValueExpression expression = _target.getValueExpression(key.toString());
        if (expression != null)
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api/src/main/java/jakarta/faces/component/behavior/_DeltaStateHelper.java [166:230]:
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        this._fullState = new HashMap<>();
        this._deltas = null;
    }

    /**
     * Used to create delta map on demand
     * 
     * @return
     */
    private boolean _createDeltas()
    {
        if (isInitialStateMarked())
        {
            if (_deltas == null)
            {
                _deltas = new HashMap<>(2, 1f);
            }
            return true;
        }

        return false;
    }
    
    protected boolean isInitialStateMarked()
    {
        return _target.initialStateMarked();
    }

    @Override
    public void add(Serializable key, Object value)
    {
        if (_createDeltas())
        {
            //Track delta case
            Map<Object, Boolean> deltaListMapValues = (Map<Object, Boolean>) _deltas.get(key);
            if (deltaListMapValues == null)
            {
                deltaListMapValues = new InternalDeltaListMap<>(3, 1f);
                _deltas.put(key, deltaListMapValues);
            }

            deltaListMapValues.put(value, Boolean.TRUE);
        }

        //Handle change on full map
        List<Object> fullListValues = (List<Object>) _fullState.get(key);
        if (fullListValues == null)
        {
            fullListValues = new InternalList<>(3);
            _fullState.put(key, fullListValues);
        }

        fullListValues.add(value);
    }

    @Override
    public <T> T eval(Serializable key)
    {
        T returnValue = (T) _fullState.get(key);
        if (returnValue != null)
        {
            return returnValue;
        }
        ValueExpression expression = _target.getValueExpression(key.toString());
        if (expression != null)
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