code: def minimumAbsDifference(self, arr: List[int]) -> List[List[int]]:
      arr[:] = sorted(arr)
      minDiff = math.inf
      output = []
  
      for index in range(1, len(arr)):
          minDiff = min(minDiff, abs(arr[index] - arr[index - 1]))
  
      for index in range(1, len(arr)):
          if abs(arr[index] - arr[index - 1]) == minDiff:
              output.append([arr[index - 1], arr[index]])
  
      return output
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.minimumAbsDifference(arr) and returns: output