Help With Union-Find Problem

What is the correct/best way to include a template class within another class? Thanks.

I have the following:

Code:

---

template <typename HashedObj>
class HashTable
{
  ...

---

and want to include it in another class:

Code:

---

class DisjointSets
{
  public:
            friend class HashTable;    //This does not work
  ...

---