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   | interface Human {     // new (name: string): void;     name: string;     eat(): void; }
  class Asian implements Human {     constructor(name:string){         this.name = name;     }     name: string;     eat(){};     sleep(){} }
  interface Man extends Human{     run(): void; }
  interface Child {     cry():void; }
  interface Boy extends Man, Child{}
  let boy: Boy = {     name: '',     run(){},     eat(){},     cry(){} }
  class Auto {     state = 1     // private state2 = 0 } interface AutoInterface extends Auto{
  } class C implements AutoInterface{     state = 1 }
  class Bus extends Auto implements AutoInterface{      }
  |