code: private void leftAddNoPredecessor(
                                       GBSNode           p,
                                       Object            new1,
                                       NodeInsertPoint   ip,
                                       InsertNodes       point)
      {
          p.findInsertPointInLeft(new1, ip);
          point.setInsert(p, ip);
      }
docs: Add to left side with no predecessor present.
  
  <p>There is no upper predecessor.  If key exists it is in left part
  of current node.</p>
  
  @param p Current node from which we tried to move left
  @param new1 Key being inserted
  @param ip Scratch NodeInsertPoint to avoid allocating a new one
  @param point Returned insert points