<PackageReference Include="System.Reactive" Version="7.0.0-preview.1" />
IEvaluatableObservable<T>
using System.
Runtime.
CompilerServices;
namespace System.
Reactive
{
[
NullableContext(
1)]
internal interface IEvaluatableObservable<[
Nullable(
2)]
out T>
{
IObservable<
T>
Eval();
}
}