docs: public void setOwner(ListenerOwner owner)
      {
          if (owner != null)
              if (m_buffer == null)
          {   // Save the current key
              KeyArea keyArea = ((Record)owner).getKeyArea(-1);
              m_buffer = new VectorBuffer(null);
              keyArea.setupKeyBuffer(m_buffer, DBConstants.FILE_KEY_AREA);
          }
          super.setOwner(owner);
      }