EDIT

	private TaxonNode parentTaxonNode;

	protected IWorkbenchPage activePage;

	/** {@inheritDoc} */

	@Override

    public Object execute(ExecutionEvent event) throws ExecutionException {

		TreeSelection selection = (TreeSelection) HandlerUtil.getCurrentSelection(event);

		Set<TaxonNode> taxonNodes = new HashSet<TaxonNode>();

		TaxonNode taxonNode= null;

		Set<UUID> taxonNodeUUIDs = new HashSet<UUID>();

				}

						("Move taxon to new parent", NavigationUtil.getUndoContext(),

								taxonNodeUUIDs, parentTaxonNode, taxonNavigator, taxonNavigator, moveToNewParent); //$NON-NLS-1$

				NavigationUtil.executeOperation(operation);

		return false;

	}

}