export type SpecialUseFlag = '\\All' | '\\Archive' | '\\Drafts' | '\\Flagged' | '\\Junk' | '\\Sent' | '\\Trash' | '\\Inbox';
export declare const SPECIAL_USE_FLAGS: SpecialUseFlag[];
export type SpecialUseResult = {
    readonly flag: SpecialUseFlag | null;
    readonly source?: 'extension' | 'name';
};
export declare const detectSpecialUse: (hasSpecialUseExtension: boolean, folder: {
    flags: ReadonlySet<string>;
    name: string;
}) => SpecialUseResult;
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