odoo16版本的render变更

今天在整理文件上传功能时，发现

odoo16的ir_ui_view.py中_render方法不见了，引用出错AttributeError: 'ir.ui.view' object has no attribute '_render'

    def _render(self, values=None, engine='ir.qweb', minimal_qcontext=False):
        assert isinstance(self.id, int)

        qcontext = dict() if minimal_qcontext else self._prepare_qcontext()
        qcontext.update(values or {})

        return self.env[engine]._render(self.id, qcontext)

    @api.model
    def _prepare_qcontext(self):
        """ Returns the qcontext : rendering context with website specific value (required
            to render website layout template)
        """
        qcontext = dict(
            env=self.env,
            user_id=