---------------------------------------------------------------------------
* The "source data con" C DataName The DataCon itself
* The "real data con" C VarName Its worker Id
- * The "wrapper data con" $wC VarName Wrapper Id (optional)
+ * The "wrapper data con" $WC VarName Wrapper Id (optional)
Each of these three has a distinct Unique. The "source data con" name
appears in the output of the renamer, and names the Haskell-source