import { DestructedPk, Entity, PkSchema, PkSchemaEdges, PkSchemaFields } from '../types/reducers.types';
import { ReducerPkUtils } from '../types/pk.types';
export declare const emptyPkSchema: PkSchema<Entity, [], []>;
/**
 * Get PK of entity
 *
 * @param {Entity} entity - Entity
 * @param {PkSchema} pkSchema - PK schema of reducer's entities
 * @returns {string} PK of entity
 */
export declare function getPkOfEntity<EntityT extends Entity, PkSchemaT extends PkSchema<EntityT, PkSchemaFields<EntityT>, PkSchemaEdges<EntityT>>>(entity: EntityT, pkSchema: PkSchemaT): string;
/**
 * Get fields and edges from entity's PK
 *
 * @param {string} pk - Entity's PK
 * @param {PkSchema} pkSchema - PK schema of reducer's entities
 * @returns {DestructedPk} Fields and edges from entity's PK
 */
export declare function destructPk<EntityT extends Entity, PkSchemaT extends PkSchema<EntityT, PkSchemaFields<EntityT>, PkSchemaEdges<EntityT>>>(pk: string, pkSchema: PkSchemaT): DestructedPk<EntityT, PkSchemaT>;
/**
 * Create reducer PK utils
 *
 * @param {PkSchema} pkSchema - PK schema of reducer's entities
 * @returns {object} PK utils
 */
export declare function createReducerPkUtils<EntityT extends Entity, PkSchemaT extends PkSchema<EntityT, PkSchemaFields<EntityT>, PkSchemaEdges<EntityT>>>(pkSchema: PkSchemaT): ReducerPkUtils<EntityT, PkSchemaT>;