code: def _set_italian_leading_zeros_for_phone_number(national_number, numobj):
      
      if len(national_number) > 1 and national_number[0] == U_ZERO:
          numobj.italian_leading_zero = True
          number_of_leading_zeros = 1
          # Note that if the number is all "0"s, the last "0" is not counted as
          # a leading zero.
          while (number_of_leading_zeros < len(national_number) - 1 and
                 national_number[number_of_leading_zeros] == U_ZERO):
              number_of_leading_zeros += 1
          if number_of_leading_zeros != 1:
              numobj.number_of_leading_zeros = number_of_leading_zeros
docs: A helper function to set the values related to leading zeros in a
      PhoneNumber.