import { Theme, ThemeInput } from '../themes';
import { Registry, RegistryInputItem, RegistryItem } from './Registry';
export interface ThemeRegistryItemExtras {
}
export type ThemeItem = RegistryItem<Theme> & ThemeRegistryItemExtras;
export type ThemeRegistryInput = RegistryInputItem<ThemeInput>;
export type ThemeCollection = ThemeInput[];
/**
 * 🎨 ThemeRegistry
 */
export declare class ThemeRegistry extends Registry<ThemeItem, ThemeRegistryInput> {
    /**
     * Adds an Item or an Item value to the registry.
     *
     * @param item
     */
    register<T = ThemeItem | ThemeItem['value'] | ThemeRegistryInput | ThemeRegistryInput['value']>(key: string | T, item?: T): Promise<string>;
    /**
     * Typeguard to check a given object is an input value
     * @param value
     */
    protected isInputValue(value: any): value is ThemeRegistryInput['value'];
    /**
     * Typeguard to check a given object is a registry item
     * @param item
     */
    protected isItem(item: any): item is ThemeItem;
    /**
     * Typeguard to check a given object is a input item
     * @param item
     */
    protected isInputItem(item: any): item is ThemeRegistryInput;
}