-// ValueSubClass - The type of objects that I hold
-// ItemParentType - I call setParent() on all of my "ValueSubclass" items, and
-// this is the value that I pass in.
-// SymTabType - This is the class type, whose symtab I insert my
-// ValueSubClass items into. Most of the time it is
-// ItemParentType, but Instructions have item parents of BB's
-// but symtabtype's of a Function
+// ValueSubClass - The type of objects that I hold, e.g. Instruction.
+// ItemParentClass - The type of object that owns the list, e.g. BasicBlock.