question: public void addFooterHolder ( ViewHolder viewHolder ) { tryThrowAlreadyBoundException ( "Cannot bind a footer holder post-bind due to limitations of view types and recycling." ) ; footerHolders . add ( viewHolder ) ; onItemRangeInserted ( getFooterStartIndex ( ) + getFootersCount ( ) , 1 ) ; }
target:  Adds a footer to this adapter.