RexUtil.FixNullabilityShuttle

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods
Total	60 of 60	0%	4 of 4	0%	4	4	14	14	2	2
visitInputRef(RexInputRef)		0%		0%	3	3	10	10	1	1
RexUtil.FixNullabilityShuttle(RexBuilder, List)		0%		n/a	1	1	4	4	1	1