import { FieldPath } from './FieldPath';
export declare function isDirectChildDocument(collectionPath: string, documentPath: string): boolean;
export declare function getNestedValue(obj: any, fieldPath: string | FieldPath): any;
/**
 * Type-aware codec that preserves supported Firestore primitives/classes
 * while rejecting cycles, unsupported prototypes, and prototype pollution.
 */
export declare function cloneNexaData(data: any, seen?: WeakSet<object>): any;
/**
 * Revives serialized JSON data back into rich Nexa/Firestore types.
 * Never infers Timestamp from an unbranded ordinary object.
 */
export declare function reviveNexaData(data: any, seen?: WeakSet<object>): any;
/**
 * Deterministic Firestore-compatible value comparison.
 */
export declare function compareNexaValues(a: any, b: any): number;
/**
 * Deterministic deep equality check.
 */
export declare function deepEqual(a: any, b: any, seen?: WeakSet<object>): boolean;
export declare function serializeConstraint(c: any): any;