import { Chain, Step } from "./types";
/**
 * Joins two steps to one
 * @param step1
 * @param step2
 */
export declare function joinSteps<I, CO1 = I, SO1 = never, E1 = never, CO2 = I, SO2 = never, E2 = never>(step1: Step<I, CO1, SO1, E1>, step2: Step<CO1, CO2, SO2, E2>): Step<I, CO2, SO1 | SO2, E1 | E2>;
/**
 * Creates chain from *step* function
 * @param step
 */
export declare function treat<I, CO = I, SO = never, E = never>(step: Step<I, CO, SO, E>): Chain<I, CO, SO, E>;