"document": {
    "document_id": string,
    "revision_id": int,
    "title": string
}

{
    "block_id": string, 
    "block_type": enum(BlockType),
    "parent_id": string,
    "children": [](string),
    "comment_ids": [](string),
    // BlockData 只能是以下其中一种，并且需与 BlockType 相对应:
    "page": object(Text),
    "text": object(Text),
    "heading1": object(Text),
    "heading2": object(Text),
    "heading3": object(Text),
    "heading4": object(Text),
    "heading5": object(Text),
    "heading6": object(Text),
    "heading7": object(Text),
    "heading8": object(Text),
    "heading9": object(Text),
    "bullet": object(Text),
    "ordered": object(Text),
    "code": object(Text),
    "quote": object(Text),
    "todo": object(Text),
    "bitable": object(Bitable),
    "callout": object(Callout),
    "chat_card": object(ChatCard),
    "diagram": object(Diagram),
    "divider": object(Divider),
    "file": object(File),
    "grid": object(Grid),
    "grid_column": object(GridColumn),
    "iframe": object(Iframe),
    "image": object(Image),
    "isv": object(ISV),
    "mindnote": object(Mindnote),
    "sheet": object(Sheet),
    "table": object(Table),
    "table_cell": object(TableCell),
    "view": object(View),
    "undefined": object(Undefined),
    "quote_container": object(QuoteContainer),
    "task": object(Task),
    "okr": object(OKR),
    "okr_objective": object(OkrObjective),
    "okr_key_result": object(OkrKeyResult),
    "okr_progress": object(OkrProgress)
}

{
    "token": string,
    "view_type": enum(BitableViewType)
}

{
    "background_color": enum(BackgroundColor),
    "border_color": enum(BorderColor),
    "text_color": enum(FontColor),
    "emoji_id": string
}

{
    "chat_id": string,
    "align": enum(Align)
}

{
    "diagram_type": enum(DiagramType)
}

{}

{
    "token": string,
    "name": string
}

{
    "column_size": int
}

{
    "width_ratio": int
}

{
    "component": {
      "type": enum(IframeComponentType),
      "url": string
    }
}

{
    "token": string,
    "width": int,
    "height": int
}

{
    "component_id": string,
    "component_type_id": string
}

{
    "token": string
}

{
    "token": string,
    "row_size": int,
    "column_size": int
}

{
    "cells":  [](string),
    "property": {
        "row_size": int,
        "column_size": int,
        "column_width":[](int),
        "merge_info": [](TableMergeInfo)
    }
}
// TableMergeInfo 单元格合并信息
{
    "row_span": int,
    "col_span": int
}

{}

{
    "view_type": enum(ViewType)
}

{}

{
    "style": object(TextStyle),
    "elements": [](TextElement)
}

{
    "align": enum(Align),
    "done": boolean,
    "folded": boolean,
    "language": enum(CodeLanguage),
    "wrap": boolean
}

{
    "text_run": object(TextRun),
    "mention_user": object(MentionUser),
    "mention_doc": object(MentionDoc),
    "reminder": object(Reminder),
    "file": object(InlineFile),
    "inline_block": object(InlineBlock),
    "equation": object(Equation),
    "undefined_element": object(UndefinedElement),
}

{
    "bold": boolean,
    "italic": boolean,
    "strikethrough": boolean,
    "underline": boolean,
    "inline_code": boolean,
    "text_color": enum(FontColor),
    "background_color": enum(BackgroundColor),
    "link": object(Link),
    "comment_ids": [](string)
}

{
    "content": string,
    "text_element_style": object(TextElementStyle)
}

{
    "user_id": string,
    "text_element_style": object(TextElementStyle)
}

{
    "token": string,
    "obj_type": enum(MentionObjType),
    "url": string,
    "text_element_style": object(TextElementStyle)
}

{
    "create_user_id": string,
    "is_notify": boolean,
    "is_whole_day": boolean,
    "expire_time": int,
    "notify_time": int,
    "text_element_style": object(TextElementStyle)
}

{
    "file_token": string,
    "source_block_id": string,
    "text_element_style": object(TextElementStyle)
}

{
	"block_id": string,
	"text_element_style": object(TextElementStyle)
}

{
    "content": string,
    "text_element_style": object(TextElementStyle)
}

{}

{
    "task_id": string
}

{
    "okr_id": string,
    "objectives": [](Objective)
}
// Objective
{
    "objective_id": string,
    "kr_ids": [](string)
}

{
    "okr_id": string,
    "period_display_status": enum(OkrPeriodDisplayStatus),
    "period_name_zh": string,
    "period_name_en": string,
    "user_id": string,
    "visible_setting": {
        "progress_fill_area_visible": boolean,
        "progress_status_visible": boolean,
        "score_visible": boolean
    }
}

{
    "objective_id": string,
    "confidential": boolean,
    "position": int,
    "score": int,
    "visible": int,
    "weight": float,
    "progress_rate": object(ProgressRate),
    "content": object(Text)
}

{
    "kr_id": string,
    "confidential": boolean,
    "position": int,
    "score": int,
    "visible": int,
    "weight": float,
    "progress_rate": object(ProgressRate),
    "content": object(Text)
}

{
    "mode": enum(OkrProgressRateMode),
    "current": float,
    "percent": float,
    "progress_status": enum(OkrProgressStatus),
    "status_type": enum(OkrProgressStatusType),
    "start": float,
    "target": float
}

{}