 button) => {
            const node = button.part.adornedPart;
            if (node !== null) {
              const thisemp = node.data;
              myDiagram.startTransaction('add employee');
              const newemp = { name: '(new person)', title: '', comments: '', parent: thisemp.key };
              myDiagram.model.addNodeData(newemp);
              const newnode = myDiagram.findNodeForData(newemp);
              if (newnode) newnode.location = node.location;
              myDiagram.commitTransact