docs: public TypeQualifierAnnotation getReturnValue(MethodDescriptor methodDesc, TypeQualifierValue<?> tqv) {
          //
          // TODO: handling of overridden methods?
          //
          Map<TypeQualifierValue<?>, TypeQualifierAnnotation> map = returnValueMap.get(methodDesc);
          if (map == null) {
              return null;
          }
          return map.get(tqv);
      }