/**
 * Structurally compares plain objects and arrays (including cycles). Dates
 * compare by timestamp; primitives and opaque objects use Object.is semantics.
 * Only enumerable own string/symbol properties participate in structural
 * comparisons. Shared-reference topology does not affect equality.
 */
export declare const deepEqual: (p1: any, p2: any, options?: {
    /** Ignore array element order, but preserve duplicate and hole counts. */
    disregardArrayOrder?: boolean;
}) => boolean;