import { CommandModuleCache } from './command_module_cache';
import type { IShellWorker } from '../defs_internal';
import type { IJavaScriptModule } from '../types/javascript_module';
import type { IWebAssemblyModule } from '../types/wasm_module';
/**
 * Loader of JavaScript/WebAssembly modules. Once loaded, a module is cached so that it is faster
 * to subsequently.
 * Must be run in a WebWorker.
 */
export declare class CommandModuleLoader {
    readonly wasmBaseUrl: string;
    readonly wasmUrlQueryParamsCallback: (filename: string) => Promise<string>;
    readonly downloadModuleCallback: IShellWorker.IProxyDownloadModuleCallback;
    constructor(wasmBaseUrl: string, wasmUrlQueryParamsCallback: (filename: string) => Promise<string>, downloadModuleCallback: IShellWorker.IProxyDownloadModuleCallback);
    /**
     * Load the specified JavaScript command module.
     * If loading fails return undefined, and caller is responsible for reporting this to the user if
     * appropriate.
     */
    getJavaScriptModule(packageName: string, moduleName: string): Promise<IJavaScriptModule | undefined>;
    /**
     * Load the specified WebAssembly command module.
     * If loading fails return undefined, and caller is responsible for reporting this to the user if
     * appropriate.
     */
    getWasmModule(packageName: string, moduleName: string): Promise<IWebAssemblyModule | undefined>;
    private _getModule;
    cache: CommandModuleCache;
}