private void visitRefConstant(Clazz clazz, RefConstant methodrefConstant) {
    String type = methodrefConstant.getType(clazz);

    parameterStackDelta = ClassUtil.internalMethodParameterSize(type);
    typeStackDelta = ClassUtil.internalTypeSize(ClassUtil.internalMethodReturnType(type));
  }
  public void visitFieldrefConstant(Clazz clazz, FieldrefConstant fieldrefConstant) {
    String type = fieldrefConstant.getType(clazz);

    typeStackDelta = ClassUtil.internalTypeSize(ClassUtil.internalMethodReturnType(type));
  }