import { t } from '../common';
export declare function isObject(value: any): boolean;
export declare function isNil(value: any): boolean;
export declare function toValue<K, V>(response: any, options?: {
    parse?: boolean;
}): t.IDbValue<K, V>;
export declare function parseValue<V>(value: any): V | undefined;
export declare function serializeValue(value: any): any;
export declare function formatWatchPatterns<T extends object = any>(pattern: Array<keyof T>): string[];
export declare function ensureTimestamps<T = any>(model: T, defaultTimestamp?: number): T;
export declare function incrementTimestamps<T = any>(model: T, defaultTimestamp?: number): T;
export declare function toValues<D extends object = any>(values: t.IDbValues<D>): t.IDbValues<D>;
export declare function toKeyValueList<D extends object = any>(values: t.IDbValues<D>): {
    key: string;
    value: D;
}[];
export declare function toValueList<D extends object = any>(values: t.IDbValues<D>): D[];