import type { Described } from './Described';
import * as I from '@principia/base/IO';
import { DataSource } from './DataSource';
export declare class DataSourceAspect<R> {
    readonly apply: <R1, A>(dataSource: DataSource<R1, A>) => DataSource<R & R1, A>;
    readonly _tag = "DataSourceAspect";
    constructor(apply: <R1, A>(dataSource: DataSource<R1, A>) => DataSource<R & R1, A>);
}
export declare function around<R, A>(before: Described<I.IO<R, never, A>>, after: Described<(a: A) => I.IO<R, never, A>>): DataSourceAspect<R>;
export declare function maxBatchSize(n: number): DataSourceAspect<unknown>;
export declare function compose_<R, R1>(self: DataSourceAspect<R>, that: DataSourceAspect<R1>): DataSourceAspect<R & R1>;
//# sourceMappingURL=DataSourceAspect.d.ts.map