/// <summary>
	/// Gets a value saved under that name. If that value does not exist, throws a <seealso cref="KeyNotFoundException"/>.
	/// </summary>
	ValueTask<TValue?> GetAsync<TValue>(string key, CancellationToken ct);

public async ValueTask<TValue?> GetAsync<TValue>(string key, CancellationToken ct)
{
	using (await _lock.LockAsync(ct))
	{
		if (!settings.DisableInMemoryCache)
		{
			var val = await InMemoryStorage.GetAsync<TValue>(key, ct);
			if (val is not null)
			{
				return val;
			}
		}
		var internalVal = await InternalGetAsync<TValue>(key, ct);
		if (!settings.DisableInMemoryCache &&
			internalVal is not null)
		{
#pragma warning disable CS8714 // Incorrect Nullability warning
			await InMemoryStorage.SetAsync(key, internalVal, ct);
#pragma warning restore CS8714 // The type cannot be used as type parameter in the generic type or method. Nullability of type argument doesn't match 'notnull' constraint.
		}
		return internalVal;
	}
}