/**
 * Build a filename from title, doc ID, and modified date.
 *
 * The title takes whatever of the 255-byte NAME_MAX the date, the id and the
 * suffix leave, rather than a flat character count: those are the same number
 * only for ASCII, and a 100-character CJK title rendered a name ext4 and APFS
 * reject outright. The id never gives, so the name keeps addressing the
 * document -- same rule as gcal's event filenames.
 */
export declare function makeFilename(title: string, docId: string, modifiedTime?: string): string;
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