如何实现类似插槽的功能

@Component 
struct Child { 
  @Builder FunABuilder0() {} 
  @BuilderParam aBuilder0: () => void = this.FunABuilder0; 
 
  build() { 
    Column() { 
      this.aBuilder0() 
    } 
  } 
} 
 
@Entry 
@Component 
struct Parent { 
  @Builder componentBuilder() { 
    Text(`Parent builder `) 
  } 
 
  build() { 
    Column() { 
      Child({ aBuilder0: this.componentBuilder }) 
    } 
  } 
}
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