/**
 *
 * utils
 *
 */
import type { ExecutionResult } from 'graphql';
/** @private */
export declare function extendedTypeof(val: unknown): 'string' | 'number' | 'bigint' | 'boolean' | 'symbol' | 'undefined' | 'object' | 'function' | 'array' | 'null';
/** @private */
export declare function isObject(val: unknown): val is Record<PropertyKey, any>;
/** @private */
export declare function isExecutionResult(val: unknown): val is ExecutionResult;
/** @private */
export declare function isAsyncIterable<T = unknown>(val: unknown): val is AsyncIterable<T>;