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| Never relationIsNotDefined() { | |
| throw ArgumentError('Relação não definida'); | |
| } | |
| void main() { | |
| String? relation; | |
| String? checkRelation() { | |
| if (relation != null) { | |
| return relation; | |
| } else { | |
| relationIsNotDefined(); | |
| } | |
| } | |
| checkRelation(); | |
| } |
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