import { Mark, Schema, StrongMark as BaseStrongMark } from '../../prosemirror';
export declare class StrongMarkType extends BaseStrongMark {
    constructor(name: string, rank: number, schema: Schema);
}
export interface StrongMark extends Mark {
    type: StrongMarkType;
}
export declare function isStrongMark(mark: Mark): mark is StrongMark;