LyNullableStringIsNumeric constructor
LyNullableStringIsNumeric(
- String message
Validation that requires a string to contain only numbers.
If the value contains anything other than numbers, the message
is returned.
Example:
final validator = LyNullableStringIsNumeric('Invalid numeric');
final result = validation('abc123');
print(result); // Invalid numeric
Implementation
LyNullableStringIsNumeric(super.message);