View getScrapView(int position, int viewType) {
		if (viewTypeCount == 1) {
			return retrieveFromScrap(currentScrapViews, position);
		} else if (viewType >= 0 && viewType < scrapViews.length) {
			return retrieveFromScrap(scrapViews[viewType], position);
		}
		return null;
	}
@return A view from the ScrapViews collection. These are unordered.
library/src/main/java/com/shizhefei/view/viewpager/RecycleBin.java