/// <summary>
/// Perform an action with the <see cref="EntityEntry{TEntity}"/> of the received value.
/// </summary>
/// <typeparam name="TSource">The type of the value.</typeparam>
/// <param name="observable">The parent observable.</param>
/// <param name="action">The action to be performed.</param>
/// <returns>An instance of <see cref="IProviderObservable{TSource}"/>.</returns>
public static IProviderObservable <TSource> WithEntityEntry <TSource>(
this IProviderObservable <TSource> observable, Action <EntityEntry <TSource> > action)
where TSource : class =>
observable.WithDbContext((source, context) =>
{
var entityEntry = context.Entry(source);
action(entityEntry);
});