import { PMF } from "./pmf.js";
/** A labeled mixture builder that preserves provenance in Bin.count. */
export declare class Mixture<L extends string = string> {
    private readonly totals;
    private readonly labelMass;
    private readonly eps;
    constructor(eps?: number);
    /** Remove all accumulated state. */
    clear(): this;
    /** Number of distinct outcome values currently accumulated. */
    size(): number;
    /** Whether a label was ever added. */
    hasLabel(label: L): boolean;
    /**
     * Add a labeled component with a mixture weight.
     * Weight can be any positive finite number. Very small contributions are pruned by eps.
     */
    add(label: L, pmf: PMF, weight?: number): this;
    buildPMF(eps?: number): PMF;
    /**
     * Produce normalized *per-label* PMFs (labels independent).
     * These are unlabeled PMFs built from the raw mass of that label alone.
     */
    byOutcome(): Record<L, PMF>;
    /**
     * Mixture weights per label, normalized to sum to 1 over labels that appeared.
     * Uses raw mass before per-outcome normalization.
     */
    weights(): Record<L, number>;
    toJSON(): {
        totals: Array<[number, number]>;
        labels: Array<[number, Record<L, number>]>;
        eps: number;
    };
    static mix<L extends string = string>(items: Array<[label: L, pmf: PMF, weight: number]>, eps?: number): PMF;
}
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