/** Return whether a reflected descriptor owns a data-property value. */
export declare function isOwnDataPropertyDescriptor(descriptor: PropertyDescriptor | undefined): descriptor is PropertyDescriptor & {
    value: unknown;
};
/** Read an own data property without invoking an accessor on the input object. */
export declare function readOwnDataProperty(input: unknown, key: PropertyKey, label: string, required?: boolean): unknown;
/**
 * Snapshot a bounded Array using only captured reflection intrinsics.
 *
 * The Array length and every indexed value must be own data properties. This
 * keeps accessors, inherited values, hostile `get` traps, and later mutation
 * outside the returned immutable snapshot.
 */
export declare function snapshotOwnDataPropertyArray<T>(input: unknown, options: {
    label: string;
    maximumEntries: number;
    mapValue: (value: unknown, index: number) => T;
}): readonly T[];
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