code: private boolean isBlocked(Pathfindable mover, int tx, int ty)
      {
          final Collection<Integer> ids = getObjectsId(tx, ty);
          int ignoredCount = 0;
          for (final Integer id : ids)
          {
              if (mover.isIgnoredId(id))
              {
                  ignoredCount++;
              }
          }
          return ignoredCount < ids.size();
      }
docs: Check if all objects id are non blocking.
  
  @param mover The mover reference.
  @param tx The horizontal tile to check.
  @param ty The vertical tile to check.
  @return <code>true</code> if blocked, <code>false</code> else.