Specify how -overrideCollectionClass is created

[haxney]

The -overrideCollectionClass argument for the -Ximmutable plugin assumes that the chosen class can be constructed directly using new OverrideCollectionClassName(args), but this is not the case for Guava's ImmutableList, which must be built using a builder or a static method, such as copyOf(Iterable).

There should be some way of specifying how the collection class should be created.

[mklemm]

Maybe it is possible to pass the whole collection construction expression as a command-line parameter