def parse_setlist_items(setlist_item_array = nil)
        return [] unless setlist_item_array
        setlist_item_array.inject([]) do |setlist_items, item|
          setlist_items << Songkickr::SetlistItem.new(item)
        end
      end
def parse_setlist_items(setlist_item_array = nil)
        return [] unless setlist_item_array
        setlist_item_array.inject([]) do |setlist_items, item|
          setlist_items << Songkickr::SetlistItem.new(item)
        end
      end
Takes the array of setlist items and create SetLists