public final ObservableList<ToolbarItem> getToolbarControlsRight() {
        return toolbarControlsRight;
    }
Returns an {@link ObservableList} which stores the toolbar items of the module.
If it's not empty, the {@link Workbench} creates a pre styled {@link ToolbarControl}
and adds the stored items on its right side.

@return the {@link ObservableList} of items which are displayed on the right side of the
automatically generated {@link ToolbarControl}
workbenchfx-core/src/main/java/com/dlsc/workbenchfx/model/WorkbenchModule.java