//fills cache if no other method for the same producer has been called before
private void FillCacheIfNeeded(string producerEmail)
{
if (!cachedItems.ContainsKey(producerEmail))
{
//TODO are we sure?
cachedItems.Add(producerEmail, component.GetItems(producerEmail).ToDictionary((item) => item.ProductNumber));
}
}
public IList <Item> GetItems(string producerEmail)
{
return(component.GetItems(producerEmail));
}