question: notifies observers about invalidating data concode_field_sep List<DataSetObserver> datasetObservers concode_field_sep void notifyDataChangedEvent concode_elem_sep void unregisterDataSetObserver concode_elem_sep void registerDataSetObserver concode_elem_sep View getEmptyItem
target: void function ( ) { if ( datasetObservers != null ) { for ( DataSetObserver loc0 : datasetObservers ) { loc0 . onInvalidated ( ) ; } } }