export interface BackfillParams {
    accountId: string;
    logPath: string;
    sinceIso?: string;
    untilIso?: string;
    batchSize?: number;
}
export interface BackfillResult {
    windowStart: string | null;
    windowEnd: string | null;
    recommendedParsed: number;
    recommendedWritten: number;
    recommendedSkippedDuplicate: number;
    clickedParsed: number;
    clickedWritten: number;
    unparseable: number;
}
export declare function visitorBackfillFromLogs(p: BackfillParams): Promise<BackfillResult>;
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