import type { docs_v1 } from "googleapis";
export interface TabSummary {
    id: string;
    title: string;
}
/** Flatten a tab tree (root tabs + nested `childTabs`) into id/title pairs. */
export declare function flattenTabSummaries(tabs: docs_v1.Schema$Tab[] | undefined): TabSummary[];
/**
 * List a Doc's tabs (identity only). Returns `[]` when the API reports no tabs
 * at all — callers treat "unknown" as "not multi-tab" rather than blocking a
 * write on a missing field.
 */
export declare function listDocumentTabs(account: string, documentId: string): Promise<TabSummary[]>;