readValue method
Implementation
String readValue() {
final String line = readLine()!;
final int colon = line.indexOf(':');
if (colon == -1) throw StateError('Invalid line: $line');
return line.substring(colon + 1).trim();
}
String readValue() {
final String line = readLine()!;
final int colon = line.indexOf(':');
if (colon == -1) throw StateError('Invalid line: $line');
return line.substring(colon + 1).trim();
}