code: public static String gridAsString(String hash, int fromRight, int fromBottom, int toRight,
              int toBottom) {
          return gridAsString(hash, fromRight, fromBottom, toRight, toBottom,
                  Collections.<String> emptySet());
      }
docs: Returns a String of lines of hashes to represent the relative positions
  of hashes on a map.
  
  @param hash reference hash
  @param fromRight
  top left of the grid in hashes to the right (can be negative).
  @param fromBottom
  top left of the grid in hashes to the bottom (can be
  negative).
  @param toRight
  bottom righth of the grid in hashes to the bottom (can be
  negative).
  @param toBottom
  bottom right of the grid in hashes to the bottom (can be
  negative).
  @return string representation of grid