import { Component, Descriptor, Property } from 'hybrids';
export type Optional<T, K extends keyof T> = Omit<T, K> & Partial<Pick<T, K>>;
export type Mixin<T> = Optional<Component<T>, 'tag'>;
export type Invalidate<E, K extends keyof E> = Parameters<Descriptor<E, E[K]>['connect']>[2];
/**
 * Check if a function is a class.
 * @category Utils
 * @param fn a function
 * @returns true if the function is a class
 */
export declare const isClass: (fn: any) => boolean;
/**
 * Convert a Hybrids property to a Hybrids Descriptor
 * @category Utils
 * @param property a Hybrids property
 * @returns a Hybrids Descriptor
 */
export declare const propertyToDescriptor: <E, V>(property: Property<E, V>) => Descriptor<E, V>;