VirtualVariable: Add some accessors for type safety. (#277) #529

Job	Run time
windows / Test Windows	46s
macos / Test macOS	36s
ci / Build	3m 17s
ci / Lint	53s
ci / Typecheck	1m 18s
ci / Test (0)	5m 27s
ci / Test (1)	7m 45s
ci / Test (2)	4m 39s
ci / Test (3)	5m 59s
ci / Test (4)	4m 55s
ci / Test (5)	9m 0s
ci / Test (6)	6m 27s
ci / Test (7)	6m 40s
ci / Test (8)	8m 18s
ci / Test (9)	3m 51s
ci / Publish Unit Tests Results	1s
	1h 9m 52s

Provide feedback