question: recursive concode_field_sep PlaceHolder placeHolder concode_field_sep void helper concode_elem_sep void main
target: ArrayList < ArrayList < Integer >> function ( int arg0 [ ] ) { ArrayList < ArrayList < Integer >> loc0 = new ArrayList < ArrayList < Integer >> ( ) ; if ( arg0 == null || arg0 . length == 0 ) return loc0 ; ArrayList < Integer > loc1 = new ArrayList < Integer > ( ) ; Arrays . sort ( arg0 ) ; helper ( loc0 , loc1 , arg0 , 0 ) ; return loc0 ; }