code: func hasUnexpectedItalianLeadingZero(number *PhoneNumber) bool {
  	return number.GetItalianLeadingZero() &&
  		!isLeadingZeroPossible(int(number.GetCountryCode()))
  }
docs: // Returns true if a number is from a region whose national significant
  // number couldn't contain a leading zero, but has the italian_leading_zero
  // field set to true.