/**
 * serializes the params object to URLSearchParams,
 * if isComplexRequest is true and the payload is not serializable as regular URLSearchParams (because of nested fields),
 * it will serialize the payload into the .r query param exclusively
 * @param params
 * @param isComplexRequest
 * @returns
 */
export declare function toURLSearchParams(params: object, isComplexRequest?: boolean): URLSearchParams;
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