public R Invoke(T argument)
{
topItems.Hit(argument);
var key = string.Join(",", this.key, argument.GetKey());
if (topItems.GetRank().Any(x => x.Id.GetKey().ToString().Equals(argument.GetKey().ToString())) && argument.IsCachable())
{
return(cache.AddOrGetExistingOrDefault(
key, () =>
{
return this.function.Invoke(argument);
}, this.CreateCachePolicy()));
}
else
{
return(this.function.Invoke(argument));
}
}