import { Client } from "./client";
export interface OptionalStringMap {
    [key: string]: string | undefined;
}
import { StringMap } from "./agent";
/**
 * toQuery
 *
 * Shallow copies object while omitting undefined attributes
 */
export declare const toStringMap: (optional?: OptionalStringMap | undefined) => StringMap;
interface OptionalTimeout {
    timeout?: number;
}
/**
 * toTimeout
 *
 * Returns timeout value from request object. Delegates to default client
 * timeout if not specified
 */
export declare const toTimeout: ({ timeout }: OptionalTimeout, client: Client) => number;
interface OptionalHeader {
    header?: OptionalStringMap;
}
/**
 * toHeader
 *
 * Extracts HTTP Header object from request and client default headers
 *
 * Precendence is given to request specific headers
 */
export declare const toHeader: ({ header }: OptionalHeader, client: Client) => StringMap;
export {};