It uses the same logic as an old back-end
(see SamType#createByValueParameter and genericSamProjectedOut.kt),
split into two parts:
1. When inserting SAM casts, use SamType#createByValueParamerer to get
the target SAM type.
2. When inserting implicit casts, cast SAM conversions as arguments of
methods of out-projected types to the original type of value parameter
instead of 'Nothing'.
Probably, when NI is there this fix will become unnecessary because
there will be no approximation applied, thus the value parameter
will remain Hello<#Captured> instead of Nothing
#KT-17171 Fixed
Alexander Udalov