void addSdf(SdfBuffer buff){
  List<SdfMacro> ops=buff.getMacroList();
  for (int i=0; i < ops.size(); i++) {
    nestNodes(topNode,ops.get(i));
  }
  tree.expandPath(new TreePath(topNode));
  tree.setRootVisible(false);
}

void addSdf ( SdfBuffer buff ) { List < SdfMacro > ops = buff . getMacroList ( ) ; for ( int i = 0 ; i < ops . size ( ) ; i ++ ) { nestNodes ( topNode , ops . get ( i ) ) ; } tree . expandPath ( new TreePath ( topNode ) ) ; tree . setRootVisible ( false ) ; }
add the instructions to the tree
