@Override
public String visitConstantPoolRef(Instruction instr, int index, Void p) {
StringBuilder sb = new StringBuilder();
sb.append(instr.getMnemonic());
cpRef(sb, instr.getOpcode(), cls.constantPool[index]);
return sb.toString();
}
@Override
public String visitUnknown(Instruction instr, Void p) {
return "bytecode " + instr.getOpcode();
}