import type { EmptyObject } from './EmptyObject.ts';
import type { DeepPickStartsWith } from './PickStartsWith.ts';
/** A predicate function used to determine which properties to pick from an object. */
export type PickByPredicate<T extends EmptyObject = Record<string, unknown>> = (value: T[keyof T], key: keyof T) => boolean;
/**
 * Creates a new object containing only the properties that satisfy the predicate, with optional recursive depth.
 * @param obj - The source object to pick properties from.
 * @param predicate - A function that returns true for properties to include.
 * @param maxDepth - Maximum recursion depth for nested objects.
 * @returns A partial copy of the object with only matching properties.
 */
export declare const pickBy: <T extends EmptyObject>(obj: T, predicate: PickByPredicate, maxDepth?: number) => Partial<T>;
/**
 * Picks all properties whose keys start with the given prefix, recursively through nested objects.
 * @param payload - The source object.
 * @param prefix - The string prefix to match keys against.
 * @param maxDepth - Maximum recursion depth.
 * @returns A new object containing only properties with matching prefixed keys.
 */
export declare const pickByPrefix: <T extends EmptyObject, P extends string>(payload: T, prefix: P, maxDepth?: number) => DeepPickStartsWith<T, P>;
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