| callback | This function is called when a progress indicator's task is paused. It takes a boolean parameter that specifies whether the task needs to pause or resume. When the value is true, the task needs to pause. When the value is false, the task needs to resume. The function returns true if it actually performed the requested action. |
| id | The progress indicator's unique ID. |
Registers a callback that is called when the user pauses a running progress indicator's task.