question: private static void insertValue ( final Map < String , List < String > > paramsMap , final String paramVal , final String parameterName ) { if ( paramVal != null ) { List < String > list = new ArrayList < > ( ) ; list . add ( paramVal ) ; paramsMap . put ( parameterName , list ) ; } }
target:  Puts the given parameter value into a new List object then adds it to the map.