import PackedBuffer from '../thunk/packed';
import AugmentedObjectManager from './manager';
import { ObjectElement } from './object';
/**
 * An element represented by an ObjectElement, using that to hold and synchronize state,
 * with a generic for the JavaScript object pattern used by the subclass.
 *
 * Subclasses should override set() and valueOf(), besides also implementing the abstract functions.
 */
export declare abstract class CompositeElement<T extends any> extends ObjectElement {
    constructor(mgr: AugmentedObjectManager, ser?: PackedBuffer | CompositeElement<T>);
    /**
     * Subclass can use this to access the correctly-typed underlying object.
     */
    protected get data(): T;
    get string(): string;
    get object(): any;
    /**
     * Called by the constructor when a new version is created, without unserialization.
     */
    protected abstract initialize(): void;
}