/**
 * Checks if two `yjs-proxy` proxies are aliases of each other.
 *
 * Two proxies are aliased if they originated from the same JS object reference
 * during conversion(s) and mutations to one will propagate to the other.
 * This happens when:
 * - The same plain JS object is assigned to multiple locations
 * - An existing proxy is assigned to another location (cloned and linked)
 *
 * Note: Aliasing only works within the same `Y.Doc`. Cross-document assignments
 * create independent clones that are not aliased.
 *
 * @param a First proxy
 * @param b Second proxy
 * @returns `true` if the proxies are aliased, `false` otherwise
 *
 * @example
 * ```ts
 * const obj = { x: 1 }
 * state.a = obj
 * state.b = obj
 *
 * areAliased(state.a, state.b) // true
 *
 * state.a.x = 10
 * console.log(state.b.x) // 10 — synced!
 * ```
 */
export declare function areAliased(a: object, b: object): boolean;