如何把一个@Component struct定义的组件，通过参数传递到另一个组件中去？

import { ErZi, SunZi } from "./TestComponent"  
  
@Entry  
@Component  
struct Index {  
  build() {  
    Column() {  
      ErZi({  
        customView: () => {  
          this.testSunZi()  
        }  
      })  
    }  
  }  
  @Builder  
  testSunZi() {  
    SunZi()  
  }  
}  
//testComponent.ets  
@Component  
export struct ErZi {  
  
  @BuilderParam customView?: () => void  
  build() {  
    Column() {  
      Text('ErZi')  
      if (this.customView) this.customView()  
    }  
  }  
}  
  
@Component  
export struct SunZi {  
  build() {  
    Column() {  
      Text('SunZi')  
    }  
  }  
}