How to use the notion.collection.NotionDate.from_notion function in notion

else:
                    val = int(val)
        if prop["type"] in ["select"]:
            val = val[0][0] if val else None
        if prop["type"] in ["multi_select"]:
            val = [v.strip() for v in val[0][0].split(",")] if val else []
        if prop["type"] in ["person"]:
            val = (
                [self._client.get_user(item[1][0][1]) for item in val if item[0] == "‣"]
                if val
                else []
            )
        if prop["type"] in ["email", "phone_number", "url"]:
            val = val[0][0] if val else ""
        if prop["type"] in ["date"]:
            val = NotionDate.from_notion(val)
        if prop["type"] in ["file"]:
            val = (
                [
                    add_signed_prefix_as_needed(item[1][0][1], client=self._client)
                    for item in val
                    if item[0] != ","
                ]
                if val
                else []
            )
        if prop["type"] in ["checkbox"]:
            val = val[0][0] == "Yes" if val else False
        if prop["type"] in ["relation"]:
            val = (
                [
                    self._client.get_block(item[1][0][1])