import type { Feature } from '@jbrowse/core/util';
export declare function findSecondLargestNumber(arr: Iterable<number>): number;
export declare function calculateAlleleCounts(feat: Feature): Map<any, any>;
export declare function calculateMinorAlleleFrequency(alleleCounts: Map<string, number>): number;
export declare function getFeaturesThatPassMinorAlleleFrequencyFilter(feats: Iterable<Feature>, minorAlleleFrequencyFilter: number, lengthCutoffFilter?: number): {
    feature: Feature;
    mostFrequentAlt: string;
    alleleCounts: Map<string, number>;
}[];