code: private boolean recycle(Segment seg) {
          if(_recycleList.size() < _recycleLimit) {
              return _recycleList.add(seg);
          }
          
          return false;
      }
docs: Recycle a free segment into the <code>_recycleList</code>.
  
  @param seg - the free Segment
  @return <code>true</code> if the specified segment is added to the <code>_recycleList</code>.