runExecutes this runnable. Returns the result of the execution.
The provided monitor can be used to report progress and respond to cancellation. If the progress monitor has been canceled, the runnable should finish its execution at the earliest convenience and return a result status of severity
IStatus.CANCEL. The singleton cancel status
Status.CANCEL_STATUScan be used for this purpose.
monitor- the monitor to be used for reporting progress and responding to cancelation. The monitor is never
- resulting status of the run. The result must not be