EDIT

    @Inject

    private EMenuService menuService;

    private NatTable natTable;

    private Map<Integer, Feature> indexToFeatureMap = new HashMap<>();

        GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);

        //update label to current data set

        toolbar.getWsLabel().setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

        toolbar.getWsLabel().getParent().layout();

        return features;

    }

        //get features/columns stored in descriptive data set

        features = initFeatureList(tree.getRoot());

        //init state data for categorical features

    private void createLayers(boolean treeView) {

        SortedList<Object> sortedList = new SortedList<>(descriptions, new MatrixRowComparator());

        // wrap the SortedList with the TreeList

        /**

         * data provider

         */

        // assemble the column groups

        LinkedList<ColumnGroupWrapper> columnGroups = new LinkedList<>();

        buildHeader(rootChildren, columnGroups);

        bodyLayer = new MatrixBodyLayerStack(eventLayer, columnGroups);

    }

    public DescriptiveDataSet getDescriptiveDataSet() {

    }

    public Collection<SpecimenNodeWrapper> getSpecimenCache() {

                                        .stream().map(ex->ex.toString())

                                        .collect(Collectors.joining("\n"))));

                    }

                    matrix.loadDescriptions(descriptiveDataSetUuid);

                }

            } catch (InterruptedException e) {

                MessagingUtils.informationDialog(Messages.CharacterMatrixPart_COULD_NOT_OPEN, Messages.CharacterMatrixPart_COULD_NOT_OPEN_MESSAGE);

                return;

            }

            matrix.createTable(treeView, true);

            thisPart.setLabel(descriptiveDataSet.getLabel());

            matrix.loadDescriptions(descriptiveDataSetUuid);

        return descriptiveDataSet;

    }

    public NatTable getNatTable() {

        return matrix.getNatTable();

    }