}

        return value;
    }

    @Override
    public List getFeedback() {
        return valueSource.getFeedback();
    }

    @Override
    public void clearFeedback() {
        valueSource.clearFeedback();
    }

                        if (last != null) {
                            logger.debug(String.valueOf(last));
                        }
                    }
                }

                interpolator.clearFeedback();
            } finally {
                for (ValueSource vs : valueSources) {
                    interpolator.removeValuesSource(vs);
                }