InstructionEditor editor = new InstructionEditor();
editor.setPC(pc);
editor.setInstruction(instruction);
editor.setLocalVariableTable(lvAttr);
editor.setClassFile(this.cf);
editor.invokeModify();
if (!editor.wasCancelled()) {
GroupAction group = new GroupAction();
List choosers = editor.getChoosers();
modifyInstructionParameters(choosers, group, instruction);
SystemFacade.getInstance().performAction(group);