docs: def filter_none(list_of_points):
      """
      
      :param list_of_points: 
      :return: list_of_points with None's removed
      """
      remove_elementnone = filter(lambda p: p is not None, list_of_points)
      remove_sublistnone = filter(lambda p: not contains_none(p), remove_elementnone)
      return list(remove_sublistnone)