public UnfoldResourceSourceAsync(
	Func<Task<TSource>> create,
	Func<TSource, Task<Option<TOut>>> readData,
	Func<TSource, Task> close
)

new : 
        create : Func<Task<'TSource>> * 
        readData : Func<'TSource, Task<Option<'TOut>>> * 
        close : Func<'TSource, Task> -> UnfoldResourceSourceAsync