EDIT

        composite.setLayout(gl_composite);

        structuresTreeEditorComposite = addFeatureTreeEditor(composite);

        initFeatureTreeComposite(structuresTreeEditorComposite,

                new FeatureNodeDragListener(structuresTreeEditorComposite.getViewer()), null, null, null, null);

        structuresTreeEditorComposite.getLabel_title().setText(Messages.CharacterEditor_STRUCTURES);

        Composite composite_1 = new Composite(sashForm, SWT.NONE);

        propertiesTreeEditorComposite = addFeatureTreeEditor(composite_1);

        initFeatureTreeComposite(propertiesTreeEditorComposite,

                new CharacterDragListener(structuresTreeEditorComposite.getViewer(), propertiesTreeEditorComposite.getViewer()),

                null,

                new Transfer[] {CharacterTransfer.getInstance()},

                null,

                null

        );

        propertiesTreeEditorComposite.getLabel_title().setText(Messages.CharacterEditor_PROPERTIES);

        characterTreeEditorComposite = addFeatureTreeEditor(composite_3);

        initFeatureTreeComposite(characterTreeEditorComposite, new FeatureNodeDragListener(characterTreeEditorComposite.getViewer()),

                new CharacterDropAdapter(this, characterTreeEditorComposite.getViewer(), sync),

                new Transfer[] {FeatureNodeTransfer.getInstance(), CharacterTransfer.getInstance()},

                this,

                this);

        characterTreeEditorComposite.getLabel_title().setText(Messages.CharacterEditor_CHARACTERS);

        //add context menu to character viewer//create context menu

            Transfer[] transfers,

            ISelectionChangedListener viewerSelectionChangedListener,

            ModifyListener modifyListener) {

        featureTreeEditorComposite.init(

                featureNodeDragListener,

                featureNodeDropAdapter,