import { JsonObject } from "./types";
/**
 * deepDiff
 * Returns the slice of `a` that differs from `b`.
 *  – Added/changed keys carry `a`'s value.
 *  – Keys that exist in `b` but not in `a` are surfaced with `null`.
 *  – For arrays, only items that are new in `a` (not present in `b`) are included.
 */
export declare function deepDiff<A extends JsonObject, B extends JsonObject>(a: A, b: B): Partial<A & B>;
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