* Checks if the given field is an instance field.
     *
     * @param field the field (must not be {@literal null})
     * @return {@literal true} if it is an instance field
     */
    public static boolean isInstanceField(final Field field) {
        assertArgumentNotNull("field", field);

        return !Modifier.isStatic(field.getModifiers());
    }

    /**
     * Checks if the given field is a public field.
     *

            }
            setFieldAccessible(field);
            final FieldDescImpl fieldDesc = new FieldDescImpl(this, field);
            fieldDescCache.put(fname, fieldDesc);
            if (!FieldUtil.isInstanceField(field)) {
                continue;
            }
            if (hasPropertyDesc(fname)) {
                final PropertyDescImpl pd = (PropertyDescImpl) propertyDescCache.get(field.getName());