import type { AnyConfigurationModel } from '@jbrowse/core/configuration';
import type { FeatureDensityStats } from '@jbrowse/core/data_adapters/BaseAdapter';
export declare function getDisplayStr(totalBytes: number): string;
export declare function getId(id: string, index: string | number): string;
export declare function getFeatureDensityStatsPre(self: {
    adapterConfig?: AnyConfigurationModel;
    setStatusMessage: (arg: string) => void;
    effectiveRpcDriverName?: string;
}): Promise<FeatureDensityStats>;