export declare function upsertFrontmatterField(block: string, field: string, value: string, overwrite: boolean): {
    nextBlock: string;
    changed: boolean;
    added: boolean;
};
export declare function replaceFrontmatter(content: string, nextBlock: string): string;
export declare function removeFrontmatterField(block: string, field: string): string;
//# sourceMappingURL=frontmatter-write.d.ts.map