Displaying duplicated labels in the tree: Working with ID's to specify the hierarchy of data, but display a label instead

This example plunker shows how we can have duplicate values represented in our tree data-enabled grid by using a separate set of values for our tree hierarchy:

Notice how all the values for 'Organisation Hierarchy' are 'Erica Rogers. This is achieved with the following data: 

var rowData = [
  {
    orgHierarchy: ['1'],
    name: 'Erica Rogers',
    jobTitle: 'CEO',
    employmentType: 'Permanent',
  },
  {
    orgHierarchy: ['1', '2'],
    name: 'Erica Rogers',
    jobTitle: 'Exec. Vice President',
    employmentType: 'Permanent',
  },
  {
    orgHierarchy: ['1', '2', '3'],
    name: 'Erica Rogers',
    jobTitle: 'Director of Operations',
    employmentType: 'Permanent',
  },

As you can see, orgHierarchy is actually an array of numbers not represented in the grid. Instead, a valueGetter is used to show 'name' while orghierarchy is used only for:

  getDataPath: function (data) {
    return data.orgHierarchy;
  },