formatInitials function
Formats a string value
to its initials.
Returns the first two initials of the input string.
If the input is null or empty, returns 'n/a'.
Implementation
String formatInitials(String? value) {
if (value == null) return formatNullable(value);
return value.isNotEmpty
? value.trim().split(RegExp(' +')).map((s) => s[0]).take(2).join()
: '';
}