Assets\Plugins\ObservableCollections\Runtime\FreezedDictionary.cs(39,44): warning CS0436: The type 'MaybeNullWhenAttribute' in 'F:\workspace\src\ObservableCollections\src\ObservableCollections.Unity\Assets/Plugins/ObservableCollections/Runtime/Shims/Nullables.cs' conflicts with the imported type 'MaybeNullWhenAttribute' in 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. Using the type defined in 'F:\workspace\src\ObservableCollections\src\ObservableCollections.Unity\Assets/Plugins/ObservableCollections/Runtime/Shims/Nullables.cs'.
Assets\Plugins\ObservableCollections\Runtime\FreezedDictionary.cs(39,44): warning CS0436: The type 'MaybeNullWhenAttribute' in 'F:\workspace\src\ObservableCollections\src\ObservableCollections.Unity\Assets/Plugins/ObservableCollections/Runtime/Shims/Nullables.cs' conflicts with the imported type 'MaybeNullWhenAttribute' in 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. Using the type defined in 'F:\workspace\src\ObservableCollections\src\ObservableCollections.Unity\Assets/Plugins/ObservableCollections/Runtime/Shims/Nullables.cs'.