import { TabixIndexedFile } from '@gmod/tabix';
import { BaseFeatureDataAdapter } from '@jbrowse/core/data_adapters/BaseAdapter';
import type { BaseOptions } from '@jbrowse/core/data_adapters/BaseAdapter';
import type { Feature, Region } from '@jbrowse/core/util';
export default class BedGraphAdapter extends BaseFeatureDataAdapter {
    private configured?;
    private configurePre;
    protected configure(): Promise<{
        bedGraph: TabixIndexedFile;
        header: string;
        columnNames: string[];
    }>;
    getNames(): Promise<string[] | undefined>;
    getRefNames(opts?: BaseOptions): Promise<string[]>;
    getHeader(): Promise<string>;
    getFeatures(query: Region, opts?: BaseOptions): import("rxjs").Observable<Feature>;
    freeResources(): void;
}