/**
 * Convert an object to a query string. Ex. { a: 1, b: 2 } => "a=1&b=2"
 * Filters out undefined values.
 */
export declare function paramsToQueryString(params?: {}): string;
export declare function fetchGet<ResType>(url: string, params?: {}, options?: {
    fallback?: ResType;
}): Promise<ResType>;
export declare function fetcher<T>(url: string, method: string, body?: {}, queryParams?: {}, fallback?: T): Promise<T>;