import type { Feature } from '@jbrowse/core/util';
export declare class VariantFeatureSession {
    private features;
    addFeatures(refName: string, features: Map<string, Feature>): void;
    getDataByID(id: string): Feature | undefined;
    discardRange(refName: string, start: number, end: number): void;
}
export declare class VariantFeatureCacheManager {
    private sessions;
    getSession(args: {
        sessionId: string;
        trackInstanceId: string;
    }): VariantFeatureSession;
    freeResources(args: {
        sessionId: string;
        trackInstanceId: string;
        regions: {
            refName: string;
            start: number;
            end: number;
        }[];
    }): void;
    deleteSession(args: {
        sessionId: string;
        trackInstanceId: string;
    }): void;
}