ArkTS中怎么完全屏蔽具体实现

export interface SdkOptions { 
  // … 配置项 
} 
 
export interface SdkApi { 
  connect(options: SdkOptions): void; 
  doSomething(): Promise<ResultType>; 
  // … 更多的API方法 
} 
 
import { SdkApi, SdkOptions } from “./sdk-interfaces”; 
 
class SdkImplementation implements SdkApi { 
  constructor(private options: SdkOptions) {} 
  connect(options: SdkOptions): void { 
    // 实现细节 
  } 
  doSomething(): Promise<ResultType> { 
    // 实现细节 
  } 
  // … 更多的API方法实现 
} 
 
import { SdkOptions, SdkApi } from “./sdk-interfaces”; 
import { SdkImplementation } from “./sdk-internal”; 
 
export function createSdk(options: SdkOptions): SdkApi { 
  return new SdkImplementation(options); 
}