List < T > function ( List < T > arg0 ) { if ( arg0 != null ) return arg0 ; return Collections . emptyList ( ) ; }
return an empty non-null list if the argument list is null . concode_field_sep PlaceHolder placeHolder concode_field_sep List<T> add concode_elem_sep T firstOrElse concode_elem_sep boolean equals concode_elem_sep List<T> list concode_elem_sep List<T> list concode_elem_sep List<T> list concode_elem_sep List<T> list concode_elem_sep List<T> list concode_elem_sep List<U> map concode_elem_sep Iterator<Pair<T,T>> pairs