Detach event handler <code>fnFunction</code> from the 'buttonClicked' event of this <code>sap.apb.SuperList</code>.
The passed function and listener object must match the ones used for event registration.
detachButtonClicked( fnFunction, oListener ) → {sap.apb.SuperList}
| Name | Type | Description |
| fnFunction | function | The function to call, when the event occurs. |
| oListener | object | Context object on which the given function had to be called. |