Given a list of numbers with duplicate number in it. Find alluniquepermutations.

Have you met this question in a real interview?

Yes

Example

For numbers[1,2,2]the unique permutations are:

[
  [1,2,2],
  [2,1,2],
  [2,2,1]
]

Challenge

Using recursion to do it is acceptable. If you can do it without recursion, that would be great!