import type * as T from "../../../../Effect";
import type * as O from "../../../../Option";
import type * as C from "../core";
/**
 * Runs the stream to collect the first value emitted by it without running
 * the rest of the stream.
 */
export declare function runHead<R, E, A>(self: C.Stream<R, E, A>): T.Effect<R, E, O.Option<A>>;
//# sourceMappingURL=runHead.d.ts.map