code: public int getFromIndex(int index) {
          Object node = objs[index];
          return node == null || node == DELETED ? -1 : ints[index];
      }
docs: Return the value stored at the specified index in the table.
  
  @param index The index to inspect, as returned from {@link #lookup}
  @return A non-negative integer if the index contains a non-null
  value, or -1 if it does.