class Replies(BaseModel):
    nodes: List[CommentsNode]


class DiscussionsCommentsNode(CommentsNode):
    replies: Replies


class Comments(BaseModel):
    nodes: List[CommentsNode]


class DiscussionsComments(BaseModel):
    nodes: List[DiscussionsCommentsNode]


class DiscussionsNode(BaseModel):
    number: int
    author: Union[Author, None] = None