private void overlayRightShift(
    int           ix)
  {
    for (int j = ix; j > 0; j--)
      _nodeKey[j] = _nodeKey[j-1];
  }
private void overlayRightShift ( int ix ) { for ( int j = ix ; j > 0 ; j -- ) _nodeKey [ j ] = _nodeKey [ j - 1 ] ; }
Overlay a key to be deleted by moving keys right.

<p>We are removing a key from a node.  We shift all of the keys
right to overlay the slot of the key to be deleted and open up the
slot occupied by the left most key in the node.</p>