Callbacks Options
The Callbacks panel appear as shown:
Figure: Callbacks

Description of the illustration apex_callbacks.png
The Callbacks panel comprises the following options:
Table: Callbacks Attributes
| Attribute | Description |
|---|---|
| Expand | To expand a selected vertex in the graph visualization, see Expand Callback for more information. |
| FetchActions | To retrieve the graph actions from a data source, refer to fetchActions for more information. |
| Persist | To persist the graph actions to a data source, refer to persist for more information. |
| UpdateGraphdata | Callback to handle events when the graph data is updated. |
| Update Rule based Style | Callback to perform custom handling when editing styles, toggling visibility checkbox , or reordering the legend items in the graph visualization legend panel. Refer to updateRuleBasedStyle for more information. |
| Custom Search Function | Callback to retrieve a list of vertices and edges that matches a search. Refer to search for more information. |
- Expand Callback
You can expand a selected vertex in the graph and fetch the adjacent vertices using the Expand callback in the Property Editor of the Page Designer.