type AdapterFunction = (exports: {
    initialize: Function;
    onmessage: (message: any, postResponse: Function) => void;
}, global: any) => void;
type Adapter = string | AdapterFunction;
/**
 * Register a worker adapter
 * @param {String} workerKey  - an unique key name of the worker adapter
 * @param {Function} adapter  - the worker adapter function, it must be a complete packaged function with no dependency of other functions
 * @example
 * maptalks.registerWorkerAdapter('foo', function (exports, global) {
        //will be called only for once when loaded in worker thread
        exports.initialize = function () {
          console.log('[worker] initialized');
        };
        //to receive message from main thread sent by maptalks.worker.Actor
        exports.onmessage = function (message, postResponse) {
          const data = message.data;
          console.log(`[worker] received data : ` + data);
          //send message back to main thread
          //the parameters:
          //error, data, buffers (arraybuffers in data)
          postResponse(null, 'message from worker thread', null);
        };
     });
    @global
    @static
 */
export declare function registerWorkerAdapter(workerKey: string, adapter: Adapter): void;
export declare function getWorkerSourcePath(): string;
export declare function createAdapter(key: string, cb: Function): void;
export {};
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