import type { ChainData } from './fetchChains';
export declare function hasPairedReads(features: ChainData): boolean;
export declare function alphaColor(baseColor: string, p: number): string;
export declare const defaultFilterFlags: {
    flagInclude: number;
    flagExclude: number;
};
export declare const negFlags: {
    flagInclude: number;
    flagExclude: number;
};
export declare const posFlags: {
    flagInclude: number;
    flagExclude: number;
};
export declare function cacheGetter<T>(ctor: {
    prototype: T;
}, prop: keyof T): void;
export declare function filterReadFlag(flags: number, flagInclude: number, flagExclude: number): boolean;
export declare function filterTagValue(readVal: unknown, filterVal?: string): boolean;