/**
 * Checks if an item is synchronous.
 * This allows us to optimize the logic a bit
 * further so that we don't need to await everything.
 *
 * @param {*} item
 * @returns {Boolean}
 */
export function isSync(item: any): boolean;
export const Sync: unique symbol;
export const Compiled: unique symbol;
export const OriginalImpl: unique symbol;
export const Unfound: unique symbol;
declare namespace _default {
    export { Sync };
    export { OriginalImpl };
    export { isSync };
}
export default _default;