Gets the result of @task as a pointer, and transfers ownership of that value to the caller.
If the task resulted in an error, or was cancelled, then this will instead return %NULL and set @error.
Since this method transfers ownership of the return value (or error) to the caller, you may only call it once.
the task result, or %NULL on error
GException on failure.
2.36
See Implementation
Gets the result of @task as a pointer, and transfers ownership of that value to the caller.
If the task resulted in an error, or was cancelled, then this will instead return %NULL and set @error.
Since this method transfers ownership of the return value (or error) to the caller, you may only call it once.