code: public RelativeInfo<Item> getRelativeInfo(int position) {
          if (position < 0 || position >= getItemCount()) {
              return new RelativeInfo<>();
          }
  
          RelativeInfo<Item> relativeInfo = new RelativeInfo<>();
          int index = floorIndex(mAdapterSizes, position);
          if (index != -1) {
              relativeInfo.item = mAdapterSizes.valueAt(index).getAdapterItem(position - mAdapterSizes.keyAt(index));
              relativeInfo.adapter = mAdapterSizes.valueAt(index);
              relativeInfo.position = position;
          }
          return relativeInfo;
      }
docs: Internal method to get the Item as ItemHolder which comes with the relative position within its adapter
  Finds the responsible adapter for the given position
  
  @param position the global position
  @return the adapter which is responsible for this position