/// <reference types="es6-promise" />
import { HttpClientResponse } from "./HttpClientResponse";
export interface HttpClientPromise {
    /**
     * onFulfilled is called when/if "promise" resolves. onRejected is called when/if "promise" rejects.
     * Both are optional, if either/both are omitted the next onFulfilled/onRejected in the chain is called.
     * Both callbacks have a single parameter , the fulfillment value or rejection reason.
     * "then" returns a new promise equivalent to the value you return from onFulfilled/onRejected after being passed through Promise.resolve.
     * If an error is thrown in the callback, the returned promise rejects with that error.
     *
     * @param onFulfilled called when/if "promise" resolves
     * @param onRejected called when/if "promise" rejects
     */
    then<U>(onFulfilled?: (value: HttpClientResponse) => U | Thenable<U>, onRejected?: (error: any) => U | Thenable<U>): Promise<U>;
    then<U>(onFulfilled?: (value: HttpClientResponse) => U | Thenable<U>, onRejected?: (error: any) => void): Promise<U>;
    /**
     * Sugar for promise.then(undefined, onRejected)
     *
     * @param onRejected called when/if "promise" rejects
     */
    catch<U>(onRejected?: (error: any) => U | Thenable<U>): Promise<U>;
}