export interface MultiFieldScorerOptions {
    fields: string[];
    fieldWeights?: Record<string, number>;
    alpha?: number | "auto";
    baseRate?: number | "auto" | null;
    k1?: number;
    b?: number;
    method?: "robertson" | "lucene" | "atire";
}
export declare class MultiFieldScorer {
    private _fields;
    private _fieldWeights;
    private _alpha;
    private _baseRate;
    private _k1;
    private _b;
    private _method;
    private _scorers;
    private _numDocs;
    constructor(options: MultiFieldScorerOptions);
    get numDocs(): number;
    get fields(): string[];
    get fieldWeights(): Record<string, number>;
    index(documents: Record<string, string[]>[]): void;
    getProbabilities(queryTokens: string[]): number[];
    retrieve(queryTokens: string[], k?: number): {
        docIds: number[];
        probabilities: number[];
    };
    addDocuments(newDocuments: Record<string, string[]>[]): void;
}
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