import type { ElementNode } from './ElementNode';
import type { Alignable } from './interfaces';
export declare const HEADING_1_NODE_TYPE = "heading-one";
export declare const HEADING_2_NODE_TYPE = "heading-two";
type HeadingType = typeof HEADING_1_NODE_TYPE | typeof HEADING_2_NODE_TYPE;
export declare enum HeadingRole {
    TITLE = "title",
    SUBTITLE = "subtitle"
}
export interface HeadingNode<T extends HeadingType = HeadingType> extends ElementNode, Alignable {
    type: T;
    role?: HeadingRole;
}
export declare function isHeadingNode(value: any): value is HeadingNode;
export declare function isHeadingNode<T extends HeadingType>(value: any, type: T): value is HeadingNode<T>;
export declare function isTitleHeadingNode(value: any): value is HeadingNode & {
    role: HeadingRole.TITLE;
};
export declare function isSubtitleHeadingNode(value: any): value is HeadingNode & {
    role: HeadingRole.SUBTITLE;
};
export {};