text: var gridOptions = {
    columnDefs: [
      { field: "country", rowGroup: true, hide: true },
      { field: "year", maxWidth: 100 },
      { field: "gold", aggFunc: 'sum' },
      { field: "silver", aggFunc: 'sum' },
      { field: "bronze", aggFunc: 'sum' },
      { field: "date" },
      { field: "sport" },
    ],
    defaultColDef: {
      flex: 1,
      minWidth: 150,
      sortable: true,
      filter: true,
    },
    autoGroupColumnDef: {
      headerName: "Athlete",
      field: "athlete",
      minWidth: 250,
      cellRenderer:'agGroupCellRenderer',
      cellRendererParams: {
        checkbox: true
      },
    },
    rowSelection: 'multiple',
    rowDeselection: true,
    groupSelectsChildren: true,
    groupSelectsFiltered: true,
    suppressRowClickSelection: true,
    groupDefaultExpanded: -1,
    isRowSelectable: function(node) {
      return node.data ? (node.data.year === 2008 || node.data.year === 2004) : false;
    },
  };
  
  function filterBy2004() {
      gridOptions.api.setFilterModel({
          year: {
              type: 'set',
              values: ['2008','2012']
          }
      });
  }
  
  function clearFilter() {
      gridOptions.api.setFilterModel(null);
  }
  
  // setup the grid after the page has finished loading
  document.addEventListener('DOMContentLoaded', function() {
    var gridDiv = document.querySelector('#myGrid');
    new agGrid.Grid(gridDiv, gridOptions);
  
    // do http request to get our sample data - not using any framework to keep the example self contained.
    // you will probably use a framework like JQuery, Angular or something else to do your HTTP calls.
    var httpRequest = new XMLHttpRequest();
    httpRequest.open('GET', 'https://raw.githubusercontent.com/ag-grid/ag-grid/master/grid-packages/ag-grid-docs/src/olympicWinnersSmall.json');
    httpRequest.send();
    httpRequest.onreadystatechange = function() {
      if (httpRequest.readyState === 4 && httpRequest.status === 200) {
        var httpResult = JSON.parse(httpRequest.responseText);
        gridOptions.api.setRowData(httpResult);
      }
    };
  });
  