getNonGsmCharacters method
Retrieves a list of characters that are not GSM-7 encoded.
Returns a list of non-GSM7 characters.
Implementation
List<String?> getNonGsmCharacters() {
return encodedChars
.where((encodedChar) => !(encodedChar.isGSM7 ?? false))
.map((encodedChar) => encodedChar.raw)
.toList();
}