private boolean isDeadlocked(Box box) Checks if the box is deadlocked. A box is deadlocked if it is not delivered and any of the following conditions is reached: The box is cornered between non pathable and non movable items The box is next to another box and none of them can be moved if the other does not moves first. Returns true if deadlock condition for box is achieved; false otherwise.

private boolean isDeadlocked(Box box) {
  // TODO: write your code here
  return false;
}