import type { ApiLoaderProperty } from '../types/utils.js';
import type { ManifestApi, ManifestElementAndApi } from '../types/base.types.js';
import type { UmbApi } from '../models/api.interface.js';
import type { UmbApiConstructorArgumentsMethodType } from './types.js';
import type { UmbControllerHost } from '../../controller-api/index.js';
/**
 * @param {UmbControllerHost} host - The controller host for this controller to be appended to
 * @param {ManifestApi} manifest - The manifest of the extension
 * @param {Array | UmbApiConstructorArgumentsMethodType} constructorArgs - The constructor arguments to pass to the API class
 * @param {ApiLoaderProperty} fallbackApi - A fallback API loader property to use if the manifest does not have one
 * @returns {Promise<UmbApi | undefined>} - The API class instance
 */
export declare function createExtensionApi<ApiType extends UmbApi = UmbApi>(host: UmbControllerHost, manifest: ManifestApi<ApiType> | ManifestElementAndApi<any, ApiType>, constructorArgs?: Array<unknown> | UmbApiConstructorArgumentsMethodType<ManifestApi<ApiType> | ManifestElementAndApi<any, ApiType>>, fallbackApi?: ApiLoaderProperty<ApiType>): Promise<ApiType | undefined>;