code: 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);
      }
docs: Get the TypeQualifierAnnotation on a method return value.
  
  @param methodDesc
  the method
  @param tqv
  the type qualifier
  @return the type qualifier annotation on the method return value, or null
  if no (interesting) type qualifier annotation was computed for
  this method