As discussed in #364 we should ideally check whether a DWT feature is supported statically. This is only realistically applicable for cycle count comparisons (but still requires a runtime check) which is only supported on the first comparator. An implementation would then have some DWTComparatorFirst and DWTComparator structures that implement a common trait: if cycle count comparison is configured for DWTComparator, an error is returned.

Opening this issue for discussion purposes for now. At present the documentation warns that cycle count comparison is only available with the first comparator.