/**
 * Recursively traverses a (potentially reactive) data structure and "observes"
 * all its properties and elements.
 *
 * This function is typically used to ensure that all parts of a reactive
 * object, array, Set, or Map are actively tracked by the reactive system.
 * Accessing each part within this function effectively registers them as
 * dependencies if called within a reactive context (like a reaction or
 * computed atom).
 *
 * It handles cycles by keeping track of visited objects.
 *
 * @param something The data structure to deeply observe.
 */
export declare const deepObserve: <T>(something: T) => void;