import type { Obj } from "@paroi/data-formatters-lib";
interface OldSiteSchema {
    version: string;
    languages: string[];
    usePlugins?: string[];
    useModules?: string[];
    site?: Obj;
    documentTypes?: Obj[];
    partTypes?: Obj[];
}
export declare function migrateFrom21To30(directory: string, siteSchema: OldSiteSchema): Promise<{
    version: string;
    languages: string[];
    usePlugins: string[] | undefined;
    useModules: string[] | undefined;
    leafTypes: Obj[];
}>;
export {};