import { Selection, getArrayFields, getFields, prepass, selectFields, type FetchOptions, type GQtyError } from 'gqty';
import * as React from 'react';
export declare const IS_BROWSER: boolean;
export declare const useIsomorphicLayoutEffect: typeof React.useLayoutEffect;
export type LegacyFetchPolicy = 'cache-and-network' | 'cache-first' | 'network-only' | 'no-cache';
export declare const legacyFetchPolicyMap: Record<LegacyFetchPolicy, FetchOptions['cachePolicy']>;
export declare const translateFetchPolicy: (fetchPolicy: LegacyFetchPolicy) => FetchOptions["cachePolicy"];
export type SelectionsOrProxy<T> = (Selection | T)[];
export declare const useExtractedSelections: <T extends object>(input?: SelectionsOrProxy<T>) => Set<Selection>;
export type List<T> = Set<T> | Array<T>;
export declare function toSetIfNeeded<T>(list: List<T>): Set<T>;
export declare function isSelectionIncluded(selection: Selection, selectionList: List<Selection>): boolean;
export declare function isAnySelectionIncluded(selectionsToCheck: List<Selection>, selectionsList: List<Selection>): boolean;
export declare function isAnySelectionIncludedInMatrix(selectionsToCheck: List<Selection>, selectionsMatrix: List<List<Selection>>): boolean;
export type OnErrorHandler = (error: GQtyError) => void;
export declare const coreHelpers: {
    prepass: typeof prepass;
    getFields: typeof getFields;
    getArrayFields: typeof getArrayFields;
    selectFields: typeof selectFields;
    castNotSkeleton: <T>(v: T) => import("gqty").NotSkeleton<T>;
    castNotSkeletonDeep: <T>(v: T) => import("gqty").NotSkeletonDeep<T>;
};
export declare function uniqBy<TNode>(list: TNode[], cb?: (node: TNode) => unknown): TNode[];
export declare function sortBy<TNode>(list: TNode[], cb: (node: TNode) => number | string, order?: 'asc' | 'desc'): TNode[];