question: @ Override public void onBindViewHolder ( BaseViewHolder holder , int position ) { int itemViewType = getItemViewType ( position ) ; if ( itemViewType != VIEWTYPE_NONE ) { Binder binder = binders . get ( itemViewType ) ; binder . onBindCallback ( holder , getItem ( position ) , position ) ; } }
target:  Matches a binderType to a viewType, handles list item binding inside the appropriate binder