import Model, { ModelData } from './model';
import { TopicType } from '../common/constants/models';
import { StyleData } from './style';
import { StyleKey } from '../common/constants/styles';
import Sheet from './sheet';
export interface TopicData extends ModelData {
    title: string;
    structureClass?: string;
    children?: {
        [type: string]: Array<TopicData>;
    };
    customWidth?: string;
    style?: StyleData;
    extensions?: Array<ExtensionData>;
}
export interface ExtensionData {
    provider: string;
    content: string | [object];
}
export declare function parseTopic(data: TopicData, sheet: Sheet): Topic;
export default class Topic extends Model {
    type: TopicType;
    private readonly _data;
    private _children;
    private _extensionMap;
    constructor(data: TopicData);
    get title(): string;
    get customWidth(): number;
    get structureClass(): string;
    addSubtopic(subtopic: Topic, options?: {
        type?: TopicType;
    }): void;
    private _addSubtopic;
    getChildrenByType(type: TopicType): Array<Topic>;
    getStyleValue(key: StyleKey): any;
    getUnbalancedInfo(): {
        rightSideCount: number;
    };
}