question: public void registerSkippedElements ( String URI , Set < String > skippedElements ) { init ( ) ; if ( skippedElementsByURI == null ) { skippedElementsByURI = new HashMap < String , Set < String > > ( 1 ) ; skippedElementsByURI . put ( URI , skippedElements ) ; } else { if ( skippedElementsByURI . containsKey ( URI ) ) { Set < String > value = skippedElementsByURI . get ( URI ) ; value . addAll ( skippedElements ) ; skippedElementsByURI . put ( URI , value ) ; } else { skippedElementsByURI . put ( URI , skippedElements ) ; } } }
target:  Registers names of elements that are to be skipped by the scanner