(&mut self, feature: BackendFeature)
| 242 | } |
| 243 | |
| 244 | pub fn require_backend_feature(&mut self, feature: BackendFeature) { |
| 245 | if !self.required_backend_features.contains(&feature) { |
| 246 | self.required_backend_features.push(feature); |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | pub fn require_backend_features(&mut self, features: impl IntoIterator<Item = BackendFeature>) { |
| 251 | for feature in features { |