Revert breaking changes

Author: aaronlademann-wf

lib/src/component/ref_util.dart

@@ -212,7 +212,7 @@ Ref<T?> createRef<T>() => react_interop.createRef();
 ///   _$Foo2Config, // ignore: undefined_identifier
 /// );
 UiFactory<TProps> uiForwardRef<TProps extends bh.UiProps>(
-    ReactNode Function(TProps props, dynamic ref) functionComponent, dynamic _config) {
+    /*ReactNode*/ dynamic Function(TProps props, dynamic ref) functionComponent, dynamic _config) {
   ArgumentError.checkNotNull(_config, '_config');
 
   if (_config is! UiFactoryConfig<TProps>) {
@@ -231,7 +231,7 @@ UiFactory<TProps> uiForwardRef<TProps extends bh.UiProps>(
   // this will be an empty string.
   final displayName = config.displayName ?? getFunctionName(functionComponent);
 
-  ReactNode _uiFunctionWrapper(JsBackedMap props, dynamic ref) {
+  /*ReactNode*/ dynamic _uiFunctionWrapper(JsBackedMap props, dynamic ref) {
     return functionComponent(propsFactory!.jsMap(props), ref);
   }
 

lib/src/component_declaration/function_component.dart

@@ -96,7 +96,7 @@ export 'component_type_checking.dart'
 /// Learn more: <https://reactjs.org/docs/components-and-props.html#function-and-class-components>.
 // TODO: right now only top level factory declarations will generate props configs.
 UiFactory<TProps> uiFunction<TProps extends UiProps>(
-  ReactNode Function(TProps props) functionComponent,
+  /*ReactNode*/ dynamic Function(TProps props) functionComponent,
   dynamic _config,
 ) {
   ArgumentError.checkNotNull(_config, '_config');

test/over_react/component_declaration/non_null_safe_builder_integration_tests/new_boilerplate/function_component_test.dart

@@ -143,7 +143,7 @@ main() {
     GenericUiProps props;
 
     setUp(() {
-      final genericFactory = uiFunction<UiProps>((_) { return null; }, UiFactoryConfig());
+      final genericFactory = uiFunction<UiProps>((_) {}, UiFactoryConfig());
       final factoryProps = genericFactory();
       expect(factoryProps, isA<GenericUiProps>(), reason: 'test setup check');
       props = factoryProps as GenericUiProps;