在UI Grid中，如何在单个单元格中添加两个按钮

columnDefs: [
  { field: 'name', displayName: '姓名' },
  { field: 'age', displayName: '年龄' },
  { field: 'actions', displayName: '操作', cellTemplate: '<div class="ui-grid-cell-contents"><button ng-click="grid.appScope.edit(row.entity)">编辑</button><button ng-click="grid.appScope.delete(row.entity)">删除</button></div>' }
]

$scope.edit = function(entity) {
  // 编辑按钮点击事件处理逻辑
};

$scope.delete = function(entity) {
  // 删除按钮点击事件处理逻辑
};

<div ui-grid="gridOptions" class="grid"></div>

$scope.gridOptions = {
  columnDefs: [
    { field: 'name', displayName: '姓名' },
    { field: 'age', displayName: '年龄' },
    { field: 'actions', displayName: '操作', cellTemplate: '<div class="ui-grid-cell-contents"><button ng-click="grid.appScope.edit(row.entity)">编辑</button><button ng-click="grid.appScope.delete(row.entity)">删除</button></div>' }
  ],
  data: [
    { name: '张三', age: 20 },
    { name: '李四', age: 25 },
    { name: '王五', age: 30 }
  ]
};