*            {@link BeanDesc}。{@literal null}であってはいけません
     */
    public PropertyDescImpl(final String propertyName, final Class<?> propertyType, final Method readMethod, final Method writeMethod,
            final BeanDesc beanDesc) {
        this(propertyName, propertyType, readMethod, writeMethod, null, beanDesc);
    }

    /**
     * {@link PropertyDescImpl}を作成します。
     *
     * @param propertyName

            }
            if (hasPropertyDesc(fname)) {
                final PropertyDescImpl pd = (PropertyDescImpl) propertyDescCache.get(field.getName());
                pd.setField(field);
                continue;
            }
            if (FieldUtil.isPublicField(field)) {
                final PropertyDescImpl pd = new PropertyDescImpl(field.getName(), field.getType(), null, null, field, this);