code: public static List<Point> getPath (
          TraversalPred tpred, Object trav, int longest,
          int ax, int ay, int bx, int by, boolean partial)
      {
          return getPath(tpred, new Stepper(), trav, longest, ax, ay, bx, by, partial);
      }
docs: Gets a path with the default stepper which assumes the piece can move one in any of the
  eight cardinal directions.