code: @Override
      public void handleInstruction(int opcode, int index) {
          bytecodeSet.set(opcode);
          offsetToOpcodeMap[index] = (short) opcode;
      }
docs: /*
  (non-Javadoc)
  
  @see
  edu.umd.cs.findbugs.ba.BytecodeScanner.Callback#handleInstruction(int,
  int)