Idiomatic `is not` in Dart

Question

Is there a more idiomaic way to express "is not" than !(o is T)?

/// Object (o) is not type (T)
/// 
/// Syntax that works but is not concise: `!(o is T)`

final word = 'drow';

if (!(word is String)) print('undoable');

Answer 1

You can use o is! T:

if (word is! String) print('undoable');

See Type test operators.