geo-smart-app/lib/model/setting.dart

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class SettingModel {
String host = "";
String id = "";
SettingModel(this.host, this.id);
bool isNullHost() {
return (this.host == "" || this.host == null);
}
bool isNullId() {
return (this.id == "" || this.id == null);
}
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bool isValid() {
return (!isNullHost() && !isNullId());
}
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}