input: from typing import List, Any
  
  def filter_out_negative(matrix: List[List[int]]) -> List[List[int]]:
      """
      Filter out all negative numbers from the given matrix.
      >>> filter_out_negative([[-1, 2, -3], [-4, 5, 6], [-7, 8, 9]])
      [[0, 2, 0], [0, 5, 6], [0, 8, 9]]
      """
      result = []
      for row in matrix:
          new_row = [max(0, num) for num in row]
          result.append(new_row)
      return result
output:     result = []
      for row in matrix:
          new_row = [max(0, num) for num in row]
          result.append(new_row)
      return result