| Flutter iOS Embedder |

### - u -

- uiTaskRunner : FlutterEngine()
- undoManagerPlugin : FlutterEngine()
- UnregisterTexture() : flutter::TextureRegistrar , flutter::TextureRegistrarImpl
- unregisterTexture: : <FlutterTextureRegistry>
- UpdateComposingText() : flutter::TextInputModel
- updateDisplays : FlutterEngine , FlutterEngine(Test)
- updateEditingState : FlutterTextInputView()
- updateKey:asPressed: : FlutterEmbedderKeyResponder()
- updatePressedModifiers: : FlutterChannelKeyResponder()
- UpdateSemantics() : flutter::AccessibilityBridge
- UpdateStorageSizeIfNecessary() : flutter::IOSSurface , flutter::IOSSurfaceSoftware
- updateViewportMetrics: : FlutterEngine()
- updateViewportMetricsIfNeeded : FlutterViewController(Tests)
- updateVisualEffectView: : PlatformViewFilter()