declare module 'markdown-it-sub' {
    import type { PluginSimple } from 'markdown-it';

    const plugin: PluginSimple;
    export default plugin;
}

declare module 'markdown-it-sup' {
    import type { PluginSimple } from 'markdown-it';

    const plugin: PluginSimple;
    export default plugin;
}

declare module 'markdown-it-mark' {
    import type { PluginSimple } from 'markdown-it';

    const plugin: PluginSimple;
    export default plugin;
}