public int getItemViewBaseType(int adapterPosition) {
        return unmaskBaseViewType(getItemViewType(adapterPosition));
    }
@param adapterPosition the adapterPosition of the item in question
@return the base type (TYPE_HEADER, TYPE_GHOST_HEADER, TYPE_ITEM, TYPE_FOOTER) of the item at a given adapter position
android/modules/module_common/src/main/java/github/tornaco/android/thanos/widget/section/SectioningAdapter.java