/**
 * Resolves the key by which a change of the given context's property is tracked
 * in the `changedProperties` of its host.
 *
 * For a `ReactiveElement` this is the property key itself. For any other context, such as a
 * `Controller`, a unique symbol per context and property is used, as the property does not exist
 * on the host and a plain key could therefore collide with a property of the host itself.
 */
export declare const getChangedPropertyKey: (context: object, propertyKey: PropertyKey) => PropertyKey;
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