import { LitElement } from '../LitElement.ts';
/**
 * Like trackPropertyKey(), but for props that have \@state() or \@property()
 * decorator
 *
 * @example
 * function trackMe() {
 *   const component = retrieveComponent();
 *   const defaultValue = 'some value';
 *   return trackPropKey(component, (key)=>console.log(key), defaultValue);
 * }
 *
 * class MyComponent extends LitElement {
 *   // Will console log "myProp"
 *   \@property() myProp = trackMe();
 *
 *   // Will console log "myState"
 *   \@state() myState = trackMe();
 * }
 */
export declare const trackPropKey: <T>(component: LitElement, onResolved: (key: string | undefined) => void, defaultValue: T) => T;