* Creates the incremental hierarchic layout module.
*
* @return the incremental hierarchic layout module
*/
private IncrementalHierarchicLayoutModule createIncrementalHierarchicLayoutModule() {
IncrementalHierarchicLayoutModule layoutModule = new IncrementalHierarchicLayoutModule();
layoutModule.setBufferedMode(true);
OptionHandler options = layoutModule.getOptionHandler();
OptionItem item = options.getItem("GROUP_LAYERING_STRATEGY");
item.setValue("RECURSIVE_LAYERING");
item = options.getItem("SELECTED_ELEMENTS_INCREMENTALLY");
item.setValue(true);