EDIT

        TaxonNode taxonNodeToMove = taxonNodeService.load(taxonNodeToMoveUuid);

        TaxonNode oldParent = taxonNodeToMove.getParent();

        sessionOwner.addExpectedUpdatedObject(oldParent);

        int childCount = oldParent.getCountChildren();

        TaxonNode newParentTreeNode = taxonNodeService.load(newParentTreeNodeUuid);

        sessionOwner.addExpectedUpdatedObject(newParentTreeNode);

        operation = new RemotingMoveTaxonOperation(sessionOwner,

                false,

                newParentTreeNode.getUuid(),

                moveToParentNode);

        operation.execute(monitor, info);