This sample demonstrates CRUD operations in Tree Grid using command column. You can perform CRUD operations as follows,
Edit - To edit record, double click a row or click Edit
            button from command column after selected a row.
          Delete - To delete record, click Delete button from
            command column after selected a row.
          Update, Cancel -You can save or discard changes by
            click Update and Cancel button from command column respectively.
          
          The Tree Grid provides an option to render CRUD action buttons in a
          column by using the CommandColumn feature. The{" "}
          columns->commands property accepts array of
          CommandModel object. The predefined command button can be defined by
          using type property.
        
The built-in command button are,
Edit 
          Delete
          Cancel
          Save
          Injecting Module:
          Tree Grid features are segregated into individual feature-wise
          modules. To use editing feature, we need to inject Edit{" "}
          module into the services.
        
More information on the selection configuration can be found in this documentation section.