*<Null safety>*
StringProperty? stringProperty (String name)
StringProperty? stringProperty(String name) { if (_writer == null) { return StringProperty.deleted(); } if (_properties.containsKey(name)) { if (_properties[name] is! StringProperty) { throw InspectStateError("Can't create StringProperty named $name;" ' a different type exists.'); } return _properties[name] as StringProperty?; } return _properties[name] = StringProperty._(name, this, _writer!); }