final String[] valueArray = new String[sourceArray.length];
        for (int i = 0; i < valueArray.length; i++) {
            final Object value = sourceArray[i].get(FieldNames.ARRAY_VALUE);
            if (value != null) {
                valueArray[i] = value.toString();
            }
        }
        return valueArray;
    }

    /**
     * Add a value.

    @Override
    public SampleElements<V> samples() {
      return samples;
    }

    @Override
    public Collection<V> create(Object... elements) {
      @SuppressWarnings("unchecked")
      V[] valuesArray = (V[]) elements;

      // Start with a suitably shaped collection of entries
      Collection<Entry<K, V>> originalEntries = mapGenerator.getSampleElements(elements.length);