HarmonyOS ArkTS语法的问题

class ISubPageParams {} 
 
代码1： 
interface IDevToolParams { 
  /** 
   * 打开调试页面的二级页面 
   * @param url 
   * @param params 
   */ 
  openSubPage(params: ISubPageParams): void 
  // openSubPage: (params: ISubPageParams) => void, 
  name:string 
} 
 
const params: IDevToolParams = { 
  openSubPage: (params: ISubPageParams) => { 
 
  }, 
  name:"999" 
} 
按代码1的写法，会报编译错误：Object literal must correspond to some explicitly declared class or interface (ArkTS-no-untyped-obj-literals) <ArkTSCheck> 
 
  代码2： 
interface IDevToolParams { 
  /** 
   * 打开调试页面的二级页面 
   * @param url 
   * @param params 
   */ 
  openSubPage: (params: ISubPageParams) => void, 
  name:string 
} 
 
const params: IDevToolParams = { 
  openSubPage: (params: ISubPageParams) => { 
 
  }, 
  name:"999" 
}